Drizzle olive oil evenly over the bottom of a 9x13-inch casserole dish, and then sprinkle with garlic and red pepper flakes. Add the chicken breasts to the bottom of the dish.
Pour the marinara sauce evenly over the chicken. Sprinkle basil over the sauce, and top with ½ of the mozzarella cheese, followed by ½ of the Parmesan cheese and crushed crackers. Top with the remaining mozzarella and Parmesan.
Bake until the cheese and crackers are golden brown and the chicken is no longer pink inside (35 minutes or more- depending on the thickness of your chicken breasts). If you use an instant read thermometer, doneness should be 160℉ into the thickest part of a chicken breast.