1cupmilkheavy cream, half and half, or other dairy option
1 1/2cupsgrated cheddar cheese
Salt and pepper
Preheat oven to 400º F. Place bacon a sheet pan and bake for 15 minutes until crisp. Remove from oven, cool and crumble.
Reduce heat of oven to 375º F.
Place pie crust into a deep dish pie plate or tart pan. Set aside.
Drizzle olive oil into a medium skillet over medium-low heat. Add mushrooms and onions, cooking until just tender. Remove from heat and set aside.
Whisk together eggs and heavy cream until light and fluffy. Add salt and pepper until well-combined. Stir in bacon crumbles, mushroom and onions, and cheese. Pour into pie shell and bake for for 35-45 minutes until the egg mixture is set. Remove from the oven and let rest 5 minutes before cutting.