Add oil a little at a time and whisk to combine marinade. Pour marinade over breasts. Cover with plastic wrap and marinate in refrigerator,turning once or twice in marinade, for at least 2 hours, or up to 4 hours. Remove breasts from marinade, scraping any bits clinging to chicken back into the shallow dish. Lightly grease grill rack with cooking spreay.
Place breasts on grill.
Cook covered with lid, basting frequently with marinade, until tender, approximately 5 to 6 minutes on each side. Chef2Chef, LLC All rights reserved. All brand names and product names used on this Web site are trade names, service marks, registered trademarks of their respective holders.