1. Combine first 5 ingredients. Reserve 1/4 cup marinade; place remaining marinade in a zip-top plastic bag. Add chicken to bag; seal. Chill 4 hours.
2. Heat a grill pan over medium-high heat. Coat pan with cooking spray. Remove chicken from bag; discard marinade in bag. Sprinkle chicken with 1/2 teaspoon salt and pepper. Add chicken to pan; baste with 2 tablespoons reserved marinade. Cook 6 minutes. Turn chicken over; baste with 2 tablespoons reserved marinade. Cook 6 minutes.
3. Combine rice, 1/4 teaspoon salt, and cilantro.