Baked Caramelized Mushroom, Onion, Spinach, and Swiss Cheese Frittata
Servings 8
Equipment
- Round Tart Pan or Pie Dish
Ingredients
- 1 tbsp of butter or olive oil
- ½ yellow onion chopped
- 8 oz button mushrooms sliced
- 2 cups of baby spinach
- ¼ cup Swiss cheese diced
- 8 eggs well-beaten
- 2 tbsp milk
- Sea salt and freshly cracked pepper to taste
Instructions
- Preheat the oven to 350 degrees. Coat a tart pan or pie dish with cooking spray.
- Heat the butter or olive oil in a large skillet over medium-high heat. Add the onions and mushrooms, then cook, stirring often, until caramelized, about 15-20 minutes.
- Add the spinach to the skillet, then season with sea salt and freshly cracked pepper to taste. Toss until well combined.
- Place some of the mushroom & onion mixture and Swiss cheese into the bottom of the tart pan.
- Combine the eggs with the milk, then season with sea salt and freshly cracked pepper to taste. Whisk the eggs until they are mixed thoroughly.
- Pour the egg mixture into the tart pan, then add the remaining onion and Swiss cheese to the top.
- Place into the oven and bake for 20-25 minutes or until a tester inserted in the center comes out clean.
- Let the frittata cool for a few minutes before slicing and serving. Enjoy.