Mini Veggie Breakfast Quiches

I adapted this recipe from one I found online. It originally called for turkey sausage but I substituted diced tomatoes, diced peppers and some spinach to make it more veggie-packed. It's a very filling, low-calorie breakfast that you can make ahead of time and then grab on the go.

8 oz. pkg. sliced mushrooms
1 diced roma tomato
1/4 cup sliced green onions
1/4 cup diced red pepper
1-2 cups spinach roughly chopped
1/4 cup grated swiss cheeese (any cheese will do)
5 eggs
3 egg whites
1 tsp. ground pepper
1 cup skim milk

Sautee the mushrooms and peppers and then add them to the rest of the diced veggies. Beat together eggs, egg whites, pepper and cheese. Place a small amount of veggie mixture in each muffin cup and then fill with egg mixture. Bake at 325 for 25 minutes. Let cool before removing from the muffin tin.

This is the original recipe found on eatingwell.com