Coat the bottom of a 9x13 inch casserole dish with olive oil, and sprinkle with garlic and hot red pepper flakes.
Arrange the chicken breasts in bottom of the baking dish, salt and pepper them, and pour marinara sauce over chicken. Sprinkle basil over marinara sauce, and top with half the mozzarella cheese, followed by half the Parmesan cheese. Sprinkle on the croutons on top of the casserole, then top with the remaining mozzarella cheese and remaining Parmesan cheese.
Cover with foil and bake for about 30 minutes in preheated oven. Remove the foil and bake for another 15-20 minutes or until cheese and croutons are golden brown and the chicken is no longer pink inside, depending on the shape and thickness of your chicken breasts.
Video
Notes
I use the chicken breasts from Costco and slice them in half lengthwise.