Turn your grill on medium high heat and let pre-heat fully. You want your grill grates to be very hot!
Remove your chicken from the bag, the marinade should still be coating the chicken. Spray each piece generously with cooking spray, to help from sticking. I recommend oiling your grill grates as well.
Place your chicken on your hot, oiled grill sprayed side down. Cook for about 7 minutes on that side, DONT MOVE IT AROUND! You want the marinade to form a crust, that will unstick from the grill when its ready to flip. You will still experience some sticking, that is normal.
Before you flip your chicken, spray again with cooking spray. You may experience some sticking to the grill, it is normal. I use a metal spatula to flip the chicken rather than tongs, because it is easier to un-stick the meat.
Cook for an additional 5-7 minutes, or until your breasts are fully cooked.
Let your chicken rest for about 5 minutes before cutting into slices and enjoying on a salad or in a wrap!