Egg White Breakfast Casserole

Description Great egg white casserole to make at the beginning of the week for a quick breakfast each morning. Ingredients 1 serving cooking spray 1 (32 ounce) container egg whites ⅓ cup nonfat plain Greek yogurt 1 pinch salt and ground black pepper to taste 1 (8 ounce) package sliced fresh mushrooms 1 small onion, … Read more