1. Whisk first 7 ingredients in a shallow dish; remove and reserve 2 tablespoons marinade for Watermelon-Feta Salad. Add chicken to dish; cover and chill 30 minutes.
2. Spray cold grill cooking grate with grilling spray; place on grill over medium heat (300° to 350°). Place chicken on grate.
3. Grill 6 minutes on each side or until done. Serve with Watermelon-Feta Salad.