Prepare a 9×13 casserole dish with non-stick spray.
Spread half of the tomato sauce in the bottom of the dish.
Place chicken breast halves in the dish and spread veggies around chicken breast.
In a small bowl mix together red pepper flakes, garlic powder, poultry seasoning, and dried basil. Sprinkle mixture over chicken and veggies.
Place 2-3 pepperoni slices on each breast half and cover with remaining sauce and cheese.
Cover with foil and bake for 20 minutes. Remove foil and bake for an additional 20 minutes or until chicken is no longer pink and has an internal temperature of 165 degrees.
Broil on high for 2-3 minutes until chicken is browned on top and cheese is melted.
Recipe Notes
To make the recipe cook quicker, divide the chicken and veggies into a 9×13 pan and an 8×8 pan to spread them out.