Mushroom Frittata Muffins

Ingredients Needed for Mushroom Frittata Muffins

1 teaspoon olive oil
1 medium onion, minced
2 cups of mushrooms, sliced
4 yolks
2 egg whites
1 tablespoon skim milk
1 teaspoon Worcestershire sauce
2 tablespoons of Emmental, grated
salt
pepper

How to Cook Mushroom Frittata Muffins

1. Heat the olive oil in a skillet over low heat and add the onion. Cook and stir until tender.
2. Add the mushrooms and sautee them until deep brown. Remove from heat.
3. Add the yolks, whites, skim milk, Worcestershire sauce, and Emmental cheese to a bowl. Season with salt and pepper, then whisk using a hand mixer.
4. Fill a 6-cup muffin pan with the mushroom mixture, then pour the batter over them. Bake for 20 minutes at 360⁰F/180⁰C.