Make 20 Minute Marinara Sauce (See Instructions Below)
In a small bowl, mix ricotta cheese, parmesan cheese, Italian seasoning and red pepper flakes. Set aside.
Pat chicken breast dry and lay flat on parchment paper.
To stuff the breast, create a pocket in the chicken breast.
Place hand on top of the chicken and using a knife, make an incision at the top side of the chicken breast where the chicken is the fattest.
Gently push knife down inside the chicken about ¾ through the chicken.
Turn the knife a few times to create a pocket inside the chicken.
In a zip lock bag, add cheese mixture and cut a small hole at the bottom corn of the bag.
Pipe in the cheese mixture from the zip lock bag into the incision of the chicken until chicken is fully stuffed.
Repeat this for each chicken breast.
Spray 9x11 casserole dish with non-fat cooking spray.
Ladle a layer on marinara sauce in dish.
Add stuffed chicken to casserole dish and pour marinara sauce over chicken breast.
Bake for 15 minutes.
Sprinkle mozzarella cheese on top of chicken and bake for additional 5 minutes.