This Parmesan-style chicken bake is done casserole style (so, no breading or frying!), but still offers up that irresistible combination of tender chicken, crunchy-cheesy coating, and flavorful sauce.
Preheat the oven to 350 degrees F (175 degrees C).
Arrange chicken breasts in the bottom of the dish, and pour marinara sauce over chicken. Sprinkle basil over marinara sauce, and top with 1/2 of the mozzarella cheese, followed by 1/2 of the Parmesan cheese. Sprinkle on croutons, then top with remaining mozzarella cheese and remaining Parmesan cheese.
Bake in the preheated oven until cheese and croutons are golden brown and the chicken is no longer pink inside, about 35 minutes to an hour, depending on the shape and thickness of your chicken breasts. An instant-read thermometer inserted into the thickest part of a chicken breast should read at least 160 degrees F (70 degrees C).