Step 1

Pre-heat oven to 375 degrees F. Place your pie crust on a baking sheet and bake for 10 minutes.

Step 2

Place butter in a nonstick pan over medium-high heat. Add in mushrooms and sauté till tender. Add in baby spinach and cook till wilted. Turn off heat and let cool slightly.

Step 3

In a medium sized bowl add the eggs and milk then whisk till combined. Season with onion salt, salt, and pepper. Gently stir in the feta cheese.

Step 4

Pour filling over your partially baked pie crust and bake for 35-40 minutes. Serve warm and enjoy!