
Preheat oven to 375 degrees F. If making homemade crust, then prepare crust as directed.
Place a sheet of parchment paper over dough and fill with pie weights or dried beans. Bake until edge is dry and light golden, about 20 Minutes. Remove parchment and weights.
Meanwhile, in a large skillet, melt butter over medium-high. Add shallots, season with salt and pepper, and cook until light golden, 6-8 minutes. Add sliced mushrooms and sauté 5 minutes longer or until mushrooms are lightly browned.
In a medium bowl, whisk together eggs and cream. Add shallots, mushrooms, and cheese and season with 1/2 teaspoon salt and 1/4 teaspoon pepper. Whisk to combine, pour into crust, and bake until center of quiche is just set, about 45 Minutes. Serve warm.
