Best Leek Gratin Recipes

POTATO LEEK GRATIN

Steps:

• Heat oven to 350 degrees and butter a 2-quart gratin dish. Wash the leeks to remove any grit and slice thinly crosswise.
• Using a mandoline or sharp knife, slice the potatoes into rounds, 1/8-inch thick. Toss with 3/4 teaspoon salt and 1/4 teaspoon pepper. Layer the rounds in the gratin dish.
• Melt the 2 tablespoons butter in a large skillet over medium heat. Add leeks, remaining salt and pepper, and thyme. Cook, stirring, until leeks are tender and golden, 5 to 7 minutes. Discard thyme and scatter the leeks over the potatoes.
• Add cream, garlic and bay leaf to the skillet, scraping up browned bits of leeks from the bottom of the pan. Simmer gently for 5 minutes. Stir in nutmeg.
• Pour the cream over the leeks and potatoes and top with the Gruyère. Cover with aluminum foil and transfer to the oven. Bake for 40 minutes, uncover and bake until the cheese is bubbling and golden, 15 to 20 minutes longer. Let cool slightly before serving.

POTATO & LEEK GRATIN

Steps:

• Pour the stock, cream and milk into a small saucepan, add the garlic and bay leaf and bring to the boil. Remove from the heat, cover and let the flavours infuse while you get on with the rest of the dish.
• Preheat the oven to 180C/gas 4/fan 160C. Butter a 2 litre gratin dish well. Mix the potatoes, leeks and ham (if using) together in the dish, and spread out in an even layer. Pour over the stock mixture and tuck the bay leaf in the middle. Season and sprinkle with the cheese.
• Stand the dish on a baking tray to catch any spills. Loosely cover with foil and bake for 30 minutes. Test the potatoes with a knife - they should be just beginning to soften. Remove the foil and bake for another 35-45 minutes, spooning some of the stock mixture over every now and again until the potatoes are tender. Cool for 15 minutes before serving.

CREAMY POTATO AND LEEK GRATIN

Steps:

• Preheat oven to 400°F with rack in middle. Generously butter a 3-qt shallow baking dish. Cut a round of parchment paper to fit just inside a 12-inch heavy skillet, then set parchment aside.
• Halve leeks lengthwise, then cut crosswise into 1 1/2-inch pieces (you should have about 8 cups). Wash leeks.
• Cook leeks in butter with 1/2 tsp salt and 1/4 tsp pepper, covered with parchment round, in skillet over medium heat, stirring occasionally, until tender, 10 to 12 minutes.
• Meanwhile, peel potatoes and slice crosswise 1/16 inch thick with slicer. Transfer to a large heavy pot with cream, milk, thyme, 1 tsp salt, and 1/2 tsp pepper and bring to a boil over medium heat, stirring occasionally (liquid will thicken). Stir in leeks, then transfer to baking dish.
• Bake, uncovered, until potatoes are tender, 45 minutes to 1 hour. Let stand 10 minutes before serving.
• Do Ahead
• Gratin can be baked 2 days ahead and chilled. Let stand at room temperature 30 minutes, then reheat, covered, in a 350°F oven until hot, about 30 minutes.

VEGAN POTATO LEEK GRATIN

Steps:

• Combine leeks, margarine, garlic, 2 teaspoons oregano, 2 teaspoons rosemary, salt, and pepper in a large saucepan over medium heat. Cook until leeks are soft, 7 to 8 minutes. Add potatoes, coconut milk, almond milk, and flour and bring to a simmer. Cover and simmer until potatoes are almost cooked, 10 to 15 minutes. Add more liquid if mixture starts to stick.
• Preheat the oven to 400 degrees F (200 degrees C). Grease a casserole dish.
• Spoon potato mixture into the prepared casserole dish and sprinkle with shredded cheese. Garnish with remaining oregano and rosemary.
• Bake in the preheated oven until potatoes are fully cooked and the top is golden brown, 20 to 30 minutes.

MUSHROOM, LEEK, AND ZUCCHINI GRATIN

Steps:

• Preheat the oven to 375 degrees F (190 degrees C). Lightly grease a 3-quart casserole dish.
• Heat 2 tablespoons oil in a large, nonstick skillet over medium heat. Add leeks and onion to the hot skillet and saute for 10 minutes. Add mushrooms and continue to saute until leeks and onion are tender, 6 to 8 more minutes.
• Meanwhile, cut zucchini, yellow squash, and Roma tomatoes into 1/4-inch slices.
• Transfer mushroom mixture to the prepared casserole dish and spread evenly over the bottom. Layer zucchini, yellow squash, and tomatoes on top of the onion mixture.
• Combine bread crumbs, Parmesan cheese, parsley, cashews, tarragon, salt, and pepper in a large mixing bowl. Sprinkle over the vegetables to cover.
• Bake in the preheated oven until gratin is dark brown all over, about 1 hour.

CAULIFLOWER AND LEEK GRATIN

Steps:

• Preheat oven to 350 degrees. Butter a shallow 2-quart baking dish and set aside.
• Bring a large pot of salted water to a boil. Add cauliflower and cook until slightly tender, 2 to 3 minutes. Drain and rinse under cold water; transfer to a large bowl and set aside.
• Melt butter in a small saucepan over medium-low heat. Add leeks, shallots, red-pepper flakes, and thyme; cook, stirring, until softened, about 5 minutes. Stir in flour until well combined. Slowly add milk, stirring constantly, until well combined. Increase heat to medium-high and bring to a boil; let boil 2 to 3 minutes until thickened. Remove from heat and stir in 3/4 cups cheese; season with salt and pepper.
• Pour leek mixture over cauliflower mixture and stir until cauliflower is well coated; transfer to prepared baking dish. Sprinkle remaining 3/4 cup cheese over top. Transfer to oven and bake until bubbly, about 25 minutes.
• Meanwhile, preheat broiler. Transfer baking dish to broiler; broil until golden brown, 5 to 8 minutes. Let cool 5 to 10 minutes before serving.

POTATO, LEEK, GRUYèRE AND OYSTER MUSHROOM GRATIN

Steps:

• Melt 2 tablespoons butter in heavy large skillet over medium-high heat. Add mushrooms and sauté until almost tender, about 5 minutes. Add garlic and sauté until mushrooms are tender and golden, about 3 minutes longer. Transfer mushroom mixture to bowl. Melt remaining 2 tablespoons butter in same skillet over medium-high heat. Add leeks and thyme and sauté until leeks are tender and beginning to brown, about 8 minutes. Add leek mixture to bowl with mushrooms. (Can be made 1 day ahead. Cover and refrigerate.)
• Preheat oven to 400°F. Butter 13 x 9 x 2-inch baking dish. Whisk broth, cream, wine, 1 teaspoon salt and 1/2 teaspoon pepper in large bowl to blend. Layer 1/3 of potatoes on bottom of prepared dish. Top with half of mushroom-leek mixture, then 3/4 cup cheese. Top with half of remaining potatoes. Pour half of cream mixture over. Top with remaining mushroom-leek mixture and 3/4 cup cheese. Cover with remaining potatoes. Pour remaining cream mixture over; sprinkle with remaining cheese.
• Bake gratin uncovered until potatoes are tender and sauce bubbles thickly, about 1 hour 20 minutes. Let gratin stand 30 minutes before serving.

LEEK AND TOMATO GRATIN

Steps:

• Heat the oven to 350. Trim the leeks of the hard green parts and outer skin, and wash them well. If they're fat, quarter them the long way. Chop the tomatoes and put them in a gratin dish long enough to hold the leeks but narrow enough so that everything is snug. Add the oil and nestle the leeks in there; sprinkle with salt and pepper.
• Bake, checking and stirring occasionally, until the tomatoes become saucy and the leeks are very, very tender, about an hour. If you like, sprinkle with Parmesan and raise the heat until the cheese melts and browns a bit. Otherwise, sprinkle with chopped parsley and serve hot or warm.

POTATO, LEEK AND FENNEL GRATIN

Steps:

• Rinse and trim off stalks of fennel. Discard the hard outer covering. Slice off bottom of bulbs and remove the center core. Slice the bulb lengthwise into 1/4" slices.
• Remove outer covering from the leeks and trim off the dark green sections. Slice remaining into 1/4" slices.
• Sauté fennel and leek slices in butter over med-high heat about 5 minutes in a large skillet. Add 3/4 tsp salt and 1 tsp thyme cover and simmer for about 10 minutes. Set aside.
• Combine potato slices, flour and 1/2 tsp salt in zip-top bag and shake to coat. Arrange half of these slices in a well buttered 13"x9" baking dish.
• Mix whipping cream and milk. Pour half of this mixture over potatoes in pan. Sprinkle with 1 1/2 cups of Gruyere cheese and 1 tsp of thyme. Spoon sautéed fennel/leeks over cheese and top with remaining potatoes. Sprinkle with remaining cheese, 1 tsp thyme, and pepper.
• Bake, covered, at 400 degrees for 45 minutes. Uncover and bake an additional 15 minutes or until browned. Let stand 10 minutes.

COD, LEEK & POTATO GRATIN

Steps:

• Preheat the oven to 375°.
• Butter a 13-inch oval gratin pan or 4 deep, individual-sized baking dishes.
• Cut the potatoes crosswise into thin, uniform slices.
• Cut the leeks crosswise into slices about twice as thick as the potatoes.
• Season the fish lightly with salt and pepper.
• Arrange half of the potato slices in the prepared dish, overlapping them to cover the bottom.
• Season lightly with salt and pepper.
• Scatter half of the leeks over the potatoes, then arrange the fish slices over the leeks in a single layer, overlapping the slices as necessary.
• Top with the remaining leeks, then with the remaining potatoes.
• Season with salt and pepper.
• Pour the cream evenly over the layers; bake for 40 minutes.
• Remove from the oven and spoon some of the cooking liquid over the top of the gratin to moisten the potatoes and help them brown.
• Continue to bake until the top layer of potatoes is tender when pierced with a sharp knife, about 20 minutes.
• Let stand for 10-15 minutes and serve.

LEEK GRATIN

Steps:

• Preheat oven to 375 degrees. Halve leeks lengthwise, leaving halves attached at root, and rinse well, shaking off water.
• In a large skillet, combine cream and leeks; season with salt and pepper. Bring to a boil over medium-high; reduce to a medium simmer, cover, and cook 5 minutes. Uncover and simmer until leeks are tender, 15 minutes. Transfer leeks and sauce to a shallow 2-quart baking dish.
• Sprinkle with cheese and bake until golden and bubbling, about 35 minutes. Let gratin rest 10 minutes before serving.

POTATO AND LEEK GRATIN

Steps:

• Preheat oven to 400 degrees.
• Fill a large bowl with water. Peel potatoes and add them to water as you peel, to prevent discoloration.
• Melt butter in a medium saucepan over medium heat. Add leeks and cook, stirring, until soft, 3 to 5 minutes. Add cream, milk, and nutmeg; cook until bubbles form around the edge. Remove from heat.
• Meanwhile, slice potatoes 1/8-inch thick. Place in even layers in a large shallow baking dish; season with salt and pepper. Pour leek-cream mixture over potatoes; sprinkle with cheese.
• Transfer to oven and bake until potatoes are fork-tender and top is brown and bubbling, about 55 minutes. Remove from oven and let cool about 10 minutes before serving.

APPLE, LEEK, AND BUTTERNUT SQUASH GRATIN

Steps:

• Preheat the oven to 350 degrees. In a 10-inch skillet, heat 2 tablespoons of oil over medium heat. Add leeks and 2 tablespoons water; season with salt and pepper. Cook, stirring occasionally, until they begin to brown, about 10 minutes. Add sherry and sage and cook until liquid is reduced to a glaze, about 3 minutes; set aside.
• In a 2-quart shallow baking dish, arrange squash in overlapping layers; season with salt and pepper. Spread leeks evenly over the squash.
• Arrange apples in an overlapping layer over the leeks. Brush apples with remaining tablespoon oil. Cover tightly with aluminum foil. Bake 45 minutes.
• Uncover and sprinkle cheese over the top. Raise the oven temperature to 450 degrees and bake 10 minutes, or until the cheese has melted and is golden brown. The tip of a paring knife should easily pierce the gratin. Let cool 10 minutes before serving. Garnish with sage leaves.

POTATO, LEEK, GRUYERE, AND OYSTER MUSHROOM GRATIN

Steps:

• Melt 2 tablespoons butter in heavy large skillet over medium-high heat. Add mushrooms and sauté until almost tender, about 5 minutes. Add garlic and sauté until mushrooms are tender and golden, about 3 minutes longer.
• Transfer mushroom mixture to bowl. Melt remaining 2 tablespoons butter in same skillet over medium-high heat. Add leeks and thyme and sauté until leeks are tender and beginning to brown, about 8 minutes.
• Add leek mixture to bowl with mushrooms. (Can be made 1 day ahead. Cover and refrigerate.).
• Preheat oven to 400°F Butter 13x9x2-inch baking dish. Whisk broth, cream, wine, 1 teaspoon salt and 1/2 teaspoon pepper in large bowl to blend.
• Layer 1/3 of potatoes on bottom of prepared dish. Top with half of mushroom-leek mixture, then 3/4 cup cheese. Top with half of remaining potatoes.
• Pour half of cream mixture over. Top with remaining mushroom-leek mixture and 3/4 cup cheese.
• Cover with remaining potatoes. Pour remaining cream mixture over; sprinkle with remaining cheese.
• Bake gratin uncovered until potatoes are tender and sauce bubbles thickly, about 1 hour 20 minutes. Let gratin stand 30 minutes before serving.

ARTICHOKE, LEEK, AND POTATO GRATIN

Steps:

• Preheat oven to 425°F. Butter 9- by 13-inch glass baking dish or 14-inch oval gratin dish.
• In medium saucepan over moderately high heat, combine leeks, 1/2 teaspoon kosher salt, and 2/3 cup water. Cover, bring to boil, then reduce heat and simmer, stirring occasionally, until tender, about 8 minutes. Drain, transfer leeks to medium bowl, and let cool.
• Using food processor slicing disk or mandoline, thinly slice potatoes, then transfer to large bowl and add cold water to cover. Stir with hands to rinse, drain well, and repeat. Layer potatoes between paper towels and pat dry.
• Add Swiss cheese, artichokes, pepper, and remaining 1 1/2 teaspoons kosher salt to leeks and toss well.
• Layer 1/3 of potatoes in bottom of prepared dish, overlapping slightly. Evenly spoon 1/2 of leek-cheese mixture over top. Top with second layer of potatoes, then remaining leek-cheese mixture, then final layer of potatoes. Slowly pour half-and-half over top. Cover snugly with foil.
• Bake 40 minutes. Remove foil, sprinkle Parmesan cheese over top, and bake until top is golden and potatoes are easily pierced with small knife, about 20 minutes more. Serve warm.

CHEESY CELERIAC, LEEK & ROSEMARY GRATIN

Steps:

• Heat the butter in a saucepan. Add the leeks, rosemary and bay leaf, then cover and cook very gently over a medium-low heat for 15-20 mins until the leeks are soft. Pour over the milk and almost all of the cream, then season and bring to the boil. Remove from the heat and leave to cool a little, then scoop out the bay leaf.
• Pour a little of the leek mixture into an ovenproof gratin dish. Arrange a layer of celeriac in the dish, then season. Spoon over some more of the leek mixture and scatter with a little cheese. Repeat the process, alternating between layers of the leek mixture, cheese and celeriac slices, then finish with a drizzle of cream and the last of the cheese. Can be prepared up to a day ahead and kept in the fridge.
• Heat oven to 180C/160C fan/gas 4. Bake the gratin for 1 hr-1 hr 15 mins until the top is golden and the celeriac is tender when poked with a knife. If the gratin is browning a little too much, cover the dish in foil. Can be chilled, then reheated in a microwave or oven on a low heat with a drizzle more cream.

MUSHROOM AND LEEK GRATIN

Steps:

• Preheat oven to 375 degrees. In a large skillet, heat 2 tablespoons oil over medium-high. Working in batches if necessary, add mushrooms and cook, tossing occasionally, until softened, 10 to 15 minutes. Transfer to a paper-towel-lined plate.
• Wipe out skillet, return to heat, and add 2 tablespoons oil. Add leeks and season with salt and pepper. Cook, stirring frequently, until softened, 8 minutes. Add wine, and cook until almost evaporated, 2 to 3 minutes. Stir in cream, lemon juice, and thyme leaves.
• Transfer leek mixture to a 2-quart baking dish. Top with mushroom slices, overlapping slightly. Sprinkle with Parmesan and bake until edges are bubbling, 20 to 25 minutes. Serve warm.

LEEK AND MUSHROOM GRATIN

Steps:

• Preheat oven to 350. Lightly grease/spray a 2-qt casserole dish.
• In a large skillet, melt butter. Add leeks and mushrooms, and salt, pepper and paprika cover and saute for 10-12 minutes; Remove from heat.
• Add light cream, parmesan cheese and swiss cheese. Stir to combine well; pour into prepared casserole dish. Sprinkle breadcrumbs on top.
• Bake at 350 for 20-25 minutes.

HADDOCK & LEEK AU GRATIN WITH SWEETCORN MASH

Steps:

• Heat oven to 200C/180 fan/gas 6. Boil the potatoes for 15-20 mins until tender, then drain. Reserve 3 tbsp corn and blitz the rest (with its juice) using a hand blender or a food processor until completely smooth, then mash into the potatoes. Cook the spinach following pack instructions - if you have a microwave, choose this method.
• Put the leeks in a pan with the 300ml milk and the butter. Cook gently, part-covered, for 8 mins until the leeks are tender. (Keep an eye on things as milk can easily boil over.) Mix the 3 tbsp milk with the flour and mustard, then stir into the leek mixture - keep stirring until thickened. Take off the heat and stir in three-quarters of the cheese.
• Squeeze as much liquid as you can from the spinach, then arrange on the base of 2 gratin dishes. Place a fish fillet on top of each, then spoon over the leek & cheese sauce. Top with the sweetcorn mash. Mix the remaining corn and cheese, and scatter on top. Place the dishes on a baking tray and cook for 25 mins until the fish flakes when tested and the top is golden.

SPINACH AND LEEK GRATIN WITH ROQUEFORT CRUMB TOPPING

Steps:

• Preheat oven to 400°F. Melt 3 tablespoons butter in medium skillet over medium-high heat. Mix in 2 tablespoons mustard, then breadcrumbs. Sauté until breadcrumbs are golden, about 5 minutes. Cool briefly. Mix in cheese.
• Toss 1 1/2 bags spinach in large nonstick pot over high heat until wilted, about 3 minutes. Transfer to sieve set over bowl. Repeat with remaining spinach. Press on spinach to drain.
• Melt remaining 2 tablespoons butter in same pot over medium-high heat. Add leek; sauté 4 minutes. Add cream, remaining 1 1/2 tablespoons mustard, and spinach. Toss until thick and blended, about 2 minutes. Season with salt and pepper. Transfer to 7x11-inch baking dish. Top with breadcrumb mixture. Bake until bubbling, about 10 minutes.