1. Preheat oven to 350. Lightly mist 8 muffin cups with cooking spray.
2. Divide the broccoli evenly among the cups (2Tbs in each). Divide the egg substitute evenly among the cups (1/4c in each). Bake the frittatas 7-9 minutes, until almost set.
3. Sprinkle the cheese evenly over the tops of the frittatas. Bake for 8-10 minutes longer, or until the egg is no longer runny and the cheese is melted. Transfer the muffin tin to a cooling rack and allow the frittatas to rest for 2 minutes before serving.