Preheat oven to 350°F.
In a small bowl mix together onion powder, granulated garlic, oregano, salt, and pepper. Set seasoning mixture aside.
In a medium bowl mix together 1 cup pizza sauce, chopped pepperoni, parmesan cheese, and ½ cup mozzarella cheese. Divide the mixture by fourths in the bowl.
Lay out the chicken cutlets, season with some of the seasoning mixture, and spread ¼ of the pizza sauce mixture onto each cutlet almost to the end. Roll up and place in a casserole dish. Sprinkle with a little more seasoning then pour the last cup of pizza sauce over chicken breast. Sprinkle rest of the mozzarella cheese on top of the chicken breasts. Then top each chicken breast with 2 pieces of pepperoni.
Bake for 50 minutes or until cooked through.
Tip: Chicken breasts can be made ahead of time and frozen before baking. Take out night before to thaw in refrigerator. Bake as directed but you might need a little longer of cooking time if still slightly frozen. You can also cook completely and freeze. Let thaw in refrigerator and warm up in toaster oven or microwave, Best results would be in oven or toaster oven.