Caramelized Onion and Sauteed Mushroom Quiche

5 from 2 votes

Caramelized Onion and Sauteed Mushroom Quiche is an impressive meal for breakfast or brunch, but it also works for lunch or dinner.

Prep Time15

Cook Time1 40

Total Time1 55

Course: Breakfast

Cuisine: Universal

Keyword: boiled eggs, breakfast, brunch, Caramelized Onions, eggs, gluten free, meatless eats, mushrooms, plant based, quiche, vegetarian

Servings:

Calories: 316kcal

1 Tablespoon unsalted butter
1 large yellow onion, thinly sliced
1 Tablespoon olive oil
16 ounces white mushrooms, wiped clean and sliced
1/4 teaspoon dried thyme or 1 teaspoon minced fresh thyme
salt and pepper
4 large eggs
1 cup whole milk
1 store bought or home made pie crust (look for rolled pie crust, not the kind that is already a in pie dish)
4 ounces goat cheese, crumbled (about 1/2 cup)

Melt the butter in a 10 or 12" skillet over medium heat. Add the onions and cook, stirring often until very soft and golden brown. As the onions cook, turn the heat down and/or add water 1 Tablespoon at a time if they begin to brown too quickly. Onions may take up to 30 minutes or more to caramelize. When done, transfer to a bowl and set aside. Alternatively, you can follow the recipe for Slow Cooker Caramelized Onions, and use approximately 1/4 of them for this recipe. store the remaining caramelized onions in an airtight container in the fridge or freezer.
Return now empty skillet to medium heat and add olive oil. Add mushrooms and cook until browned and water has been cooked out of them. Stir in thyme and season to taste with salt and pepper. Remove from heat and set aside.
Heat oven to 375°F. In a medium bowl, whisk together the eggs and milk. Set aside.
Roll out pie crust and place into a 9" pie plate or quiche dish. Add caramelized onions and sauteed mushrooms to the pie crust. Pour egg mixture over onions and mushrooms and sprinkle goat cheese on top.
Bake for 30-40 minutes, until egg is set.

Onions and mushrooms can be prepared ahead of time, and stored in airtight containers in the fridge for up to one day.