The perfect breakfast quiche is light, flaky, and full of flavor. And that’s exactly what you get with this quiche packed with bacon, mushrooms, and a healthy amount of Gruyere cheese!
Add the grated Parmesan cheese and butter. Pulse until the pieces of butter are the size of peas, about five 3-second pulses.
¼ cup grated Parmesan cheese, 6 tablespoons unsalted butter
With the processor running, slowly add 3 tablespoons of water. When a dough is formed and tested by making a fist, it’s done. If it does not hold together, add another tablespoon of water.
3-5 tablespoons cold water
Dump the dough onto clear plastic wrap. Knead with the plastic and wrap tightly into a disk. Chill for at least half an hour.
Once chilled, remove from the plastic and roll on a floured surface to a 12-inch rough circle. Place in a 9-inch tart pan or a 10-inch pie dish. Let the dough fall into the corners and remove any excess over the edges. Place shell in the freezer to firm up for 20 minutes.
Once cold, remove from freezer. Line with parchment and weights (or dry beans). Bake at 375°F until the bottom is set, 15 minutes.
Remove parchment and weights and continue baking until crisp and golden, 5-7 minutes.
Remove the shell from the oven and set aside.
For the filling
Melt the butter or bacon grease in a 12-inch skillet.
2 tablespoons unsalted butter (or bacon grease)
Add the onion and sauté until translucent, 5 minutes.
½ medium onion
Add the sliced mushrooms, ½ teaspoon salt, and ½ teaspoon black pepper. Continue to sauté until the mushrooms are cooked down, 8 minutes. Set aside to cool.