1. Preheat oven to 350°. 2. Heat olive oil in a large nonstick skillet over medium-high heat. Add onion; cook 2 minutes. 3. Add mushrooms; cook, stirring frequently, 4 minutes or until the mushrooms are tender. 4. Add spinach; cover and cook 1 minute or just until spinach is wilted. 5. In a medium bowl, combine eggs, egg whites, 1/4 cup cheese, salt, and pepper; mix well. 6. Add spinach mixture; mix well. 7. Pour mixture into an 8-inch round cake pan coated with cooking spray. 8. Sprinkle remaining 1/4 cup cheese over frittata. 9. Bake 30 minutes or until eggs are set in center and cheese has melted. 10. Cut into 4 wedges. ---------------------------------------------------------------------------
Nutrition
Ingredients
