Mix Marinade Mix, oil, water and mustard in small bowl. Reserve 2 tablespoons marinade for brushing. Place chicken in large resealable plastic bag or glass dish. Add remaining marinade; turn to coat well.
Refrigerate 30 minutes or longer for extra flavor. Remove chicken from marinade. Discard any remaining marinade.
Grill chicken over medium heat with lid closed 30 to 40 minutes or until cooked through, turning occasionally and brushing with reserved marinade.