Preheat oven to 425°F. Spray a nonstick skillet with cooking spray and heat over medium-high heat.
In a bowl, whisk together eggs, egg whites, onion, garlic and Parmesan cheese. Pour into pre-heated nonstick skillet and cook until starts to set and gets firm in the middle (about 5 to 7 minutes).
Pour pasta sauce over eggs and spread within one inch of the sides. Sprinkle with desired toppings and mozzarella cheese.
Bake for 10 minutes, or until cheese is melted and eggs are cooked thoroughly.
Recipe by Alida's Kitchen at https://www.alidaskitchen.com/2014/08/22/pizza-frittata-recipe/