Preheat oven to 450 degrees. Spray muffin tin with non-stick cooking spray.
Microwave frozen vegetables for 3-4 minutes, or until thawed. Squeeze dry.
Add eggs to a large bowl, along with veggies, cheese, salt and pepper. Stir until well combined. Divide egg mixture into 10 muffin molds.
Bake for 20-25 minutes, or until eggs are set and slightly browned on the top. Remove from the oven, and let cool until able to handle. Remove by sliding a knife between the egg and the muffin tin to loosen frittata. Enjoy warm!