This is a quick, healthy meal that isn't time consuming to prepare and easy to clean up! To prevent rice from sticking to the foil, spray foil with cooking spray before using. Or, use nonstick foil. If the chicken breast halves in your market are larger than 4 oz. each, they will take longer to cook. Be sure to cook them long enough so that they are no longer pink in the centers and the juices run clear (170°F).