Best French Onion Portobello Burgers Recipes

STUFFED FRENCH ONION SOUP BURGER

Steps:

• For the onion jam: Heat a large saute pan, then toss in the onion and garlic slices with 2 tablespoons oil and a generous pinch of salt. Cook over medium heat for 2 to 3 minutes, then add the Marsala, brown sugar and mustard and cook, stirring occasionally, until the onions are caramelized and tender, 20 to 25 minutes. (Do not rush this step, because properly caramelized onions make this burger top-notch!) Stir in the vinegar and cook to blend in, 1 to 2 minutes. Set aside.
• For the burgers: In a medium bowl, break up the meat and spread it up on the sides of the bowl so that the seasoning really permeates. Sprinkle the meat with salt and pepper. Gently mix in the Marsala, soy sauce and Worcestershire. Do not overmix. (The more you work the meat, the tougher the burger.) Form the meat into 4 even patties that are about 3/4-inch thick and transfer to a baking sheet.
• Use a spoon to gently scoop out a little meat and make a hole or pocket in the center of each patty that does not go all the way through to the bottom. Place about 1/4 cup Gruyere in the hole of each patty. Flatten the piece of meat you scooped out and press it over the cheese so that it's hidden in the middle of the patty. Turn the patty on the other side that it is weighing down on the seam. Repeat with the remaining patties. Refrigerate for at least 30 minutes and up to 6 hours.
• Preheat the oven to 400 degrees F.
• Heat a large skillet over medium-high heat and add the remaining 4 tablespoons oil. Sprinkle the patties lightly with salt. When the oil begins to smoke lightly, arrange the patties in a single layer, cheese-pocket-side down, at a distance from one another. Cook the patties, undisturbed, until the bottom browns, 3 to 5 minutes. Turn the patties on their other sides and let the bottoms brown again, 3 to 5 minutes. Lower the heat and add the stock to the skillet and cover. Cook on low heat until the patties are cooked through, 8 to 10 additional minutes. Remove the cover, shut off the heat under the skillet and let the patties rest with the heat off.
• Arrange the bun halves in a single layer on a baking sheet and sprinkle each bun half with about 1/4 cup Gruyere. Place the baking sheet in the center of the oven and toast until the buns are golden brown and the cheese is bubbling and melted, 5 to 8 minutes. Season with salt and pepper.
• Arrange the bun bottoms on a flat surface. Mix the onion jam and remaining cup Gruyere into the liquid in the skillet. Taste for seasoning. Spoon some of the onions and liquid on each bun bottom and top with the patties and more onions. Top with a few slices of pickle and season the bun tops with a pinch of salt. Close the burgers and serve.

FRENCH ONION BURGERS

Steps:

• Heat the olive oil in a large skillet over medium-high heat. Add the onion and cook, stirring, until it starts to brown, 3 to 4 minutes. Add the sugar and 1/2 teaspoon salt, reduce the heat to medium low and cook, stirring occasionally, until deep golden, 15 more minutes. Add the chicken broth and 1 teaspoon Worcestershire sauce and simmer until the onion is tender and the liquid is almost evaporated, 8 minutes.
• Preheat the broiler. Mix the beef, onion powder and the remaining 2 tablespoons Worcestershire sauce in a bowl with your hands. Form into four 3/4-inch-thick patties and place on a broiler pan. Make an indentation in the center of each with your thumb; season the patties with salt. Broil, turning once, 5 minutes.
• Place the buns cut-side up on a baking sheet. Sprinkle with both cheeses and broil until melted, about 1 minute. Spread mustard on the buns; sandwich with lettuce, the burgers and caramelized onion. Serve with potato chips.

PORTOBELLO MUSHROOM AND ONION BURGER TOPPING

Steps:

• 1. Saute mushrooms and onion in olive oil in large saucepan for 3 to 4 minutes. Add water and cover with lid. Simmer another 3 to 4 minutes. Remove lid and add steak sauce.
• 2. Prepare veggie burgers according to package directions.
• Serve burger on bun with warm topping.
• ON THE GRILL:
• Preheat grill
• Use a food thermometer to be sure patties reach minimum internal temperature of 165 degrees F.
• Note: Recipe is vegan only if vegan steak sauce and Morningstar Farms® Grillers® Vegan Veggie Burgers are used.
• ®, ™, ©, 2010 Kellogg NA Co. Morningstar Farms Recipes are the property of the Kellogg Company.
• This recipe has been tested and endorsed by Kellogg and Morningstar Farms®.

PORTOBELLO BURGERS

Steps:

• Combine marinade ingredients. Place caps into a baking dish and pour marinade over top. Use a brush to make sure all caps are covered with the marinade. Set aside and let marinate up to 2 hours.
• Remove the portobellos from marinade (do not discard marinade) and place gill side down on a preheated gas, electric or charcoal grill over medium-high heat. Grill 3 to 4 minutes per side. Top each cap with cheese 2 minutes to melt before they are finished grilling.
• In a medium bowl combine 1/2 cup mayonnaise and 2 tablespoons of the marinade.
• Spread the flavored mayonnaise onto each bun and top with portobellos. Serve with sliced onion, lettuce and tomato.

GRILLED PORTOBELLO BURGER WITH ONION JAM

Steps:

• Put the yogurt in a paper towel-lined strainer set over a bowl, set aside to drain and thickened, about 60 minutes. Discard the watery liquid. Whisk the horseradish into the thickened yogurt.
• Meanwhile, heat 2 tablespoons of the olive oil in a medium skillet, over medium heat. Add the onions, 1 thyme sprig, and season with salt and pepper, to taste. Cook, covered, until the onions have wilted, about 10 to 15 minutes, (give them a stir every now and then with a wooden spoon to prevent them from sticking). Add the red wine, and simmer over high heat until most of the wine gets absorbed into the onions. Add the honey and red wine vinegar and simmer gently until the onions get jam-like, about, about 15 minutes.
• Preheat a stove top grill pan over medium-high heat. Whisk the remaining 2 tablespoons oil, garlic, and balsamic vinegar in a bowl. Strip and add the leaves from the remaining sprig of thyme. Coat the mushroom caps all over with the flavored olive oil. Grill the mushrooms, turning as needed, until tender but not mushy about 3 to 4 minutes per side. Season with the salt and pepper.
• Sandwich the mushroom between the buns, top with some of the onion jam, some lettuce, and a dollop of the horseradish cream. Serve warm.

FRENCH ONION BURGERS

Steps:

• In a bowl, combine the onions, Worcestershire sauce, salt and mushrooms if using. Crumble beef over mixture and mix well. Shape into 4 patties.
• Grill, uncovered, over medium heat or broil 4 inches from the heat for 6-9 minutes on each side or until no longer pink. Serve on buns with any condiments and toppings of your choice.

GRILLED PORTOBELLO BURGERS

Steps:

• Brush mushrooms with 4 tablespoons vinaigrette. Grill mushrooms and onion, covered, over medium heat 3-4 minutes on each side or until tender. Top mushrooms with red peppers, onion and cheese. Grill, covered, 2-3 minutes longer or until cheese is melted. Grill rolls, cut side down, 1-2 minutes or until toasted., Spread roll bottoms with mayonnaise and drizzle with remaining vinaigrette. Top with mushrooms; replace roll tops.

FRENCH ONION BURGERS

Steps:

• In a large bowl, combine the mushrooms, onions, Worcestershire sauce and salt. Crumble beef over mixture and mix well. Shape into four patties. , Grill, uncovered, over medium heat or broil 4 in. from the heat for 6-9 minutes on each side or a until a thermometer reads 160° and juices run clear. Serve on buns with lettuce and tomato.