In a large resealable plastic bag, combine the first six ingredients; add pork. Seal bag and turn to coat; refrigerate for 4 hours, turning occasionally.
Drain and discard marinade. Grill the tenderloins, covered, over indirect medium heat for 8-9 minutes on each side or until meat juices run clear and a meat thermometer reads 160°. Sprinkle with pepper if desired. Yield: 8 servings.
