QUICHE LORRAINE

Steps:

• Make the crust: Pulse the flour and salt in a food processor. Add the butter and pulse until it looks like coarse meal. Add 3 tablespoons ice water and pulse until the dough starts to come together. Add up to 1 more tablespoon ice water, a little at a time, if necessary. Form the dough into a disk and wrap in plastic wrap. Refrigerate until firm, at least 1 hour or overnight.
• Remove the dough from the refrigerator and let soften 10 minutes. Unwrap the dough on a floured surface. Roll out the dough into an 11-inch round, lightly dusting with flour as needed and turning the dough occasionally. Carefully transfer to a 9-inch pie plate and crimp the edges with your fingers. Prick the bottom of the crust all over with a fork, then refrigerate until firm, 20 to 30 minutes.
• Preheat the oven to 350˚ F. Line the dough with parchment paper and fill with dried beans or pie weights. Put on a baking sheet and bake until lightly golden around the edges, 20 to 25 minutes. Remove the parchment and weights and continue baking until golden brown in the center, 20 to 25 more minutes. Transfer to a rack and let cool completely.
• Meanwhile, make the filling: Combine the butter, onion and a big pinch of salt in a medium skillet over low heat. Cook, stirring occasionally, until the onion is very tender and golden brown, 20 to 25 minutes. While the onion cooks, put the bacon in a small nonstick skillet over medium heat and cook, stirring occasionally, until golden brown and crisp, 7 to 10 minutes. Remove to a paper towel-lined plate. Add the bacon to the pan with the onion, along with the thyme.
• Spread the Gruyère and onion-bacon mixture in the cooled pie crust. Combine the eggs, heavy cream, chives, nutmeg, cayenne and 3/4 teaspoon salt in a large bowl and whisk until combined. Pour into the pie crust. Bake until the quiche is just set and lightly golden brown, 40 to 45 minutes. Let cool before serving.