Ingredients

• pie crust - 1
• fresh spinach - 4 cups
• mushrooms - 2 cups, sliced
• eggs - 4
• heavy cream - 1 cup
• grated cheese (Swiss or Gruyère) - 1 cup
• salt - ½ teaspoon
• black pepper - ¼ teaspoon
• olive oil - 1 tablespoon
• onion - 1, diced

Instructions

1. 1.

   Preheat the oven to 375°F (190°C).

2. 2.

   In a skillet, heat olive oil over medium heat and sauté the diced onion until translucent.

3. 3.

   Add the sliced mushrooms and cook until browned, about 5-7 minutes.

4. 4.

   Stir in the fresh spinach and cook until wilted. Remove from heat and let cool slightly.

5. 5.

   In a bowl, whisk together the eggs, heavy cream, salt, and black pepper.

6. 6.

   Add the mushroom and spinach mixture to the egg mixture and stir to combine.

7. 7.

   Place the pie crust in a quiche or pie dish and pour the filling into the crust.

8. 8.

   Sprinkle the grated cheese evenly on top.

9. 9.

   Bake in the preheated oven for 35-40 minutes, or until the quiche is set and lightly golden.

10. 10.

    Allow to cool for a few minutes before slicing and serving.