1. Combine first 5 ingredients in a heavy-duty zip-top plastic bag; add fish fillets. Seal bag securely, and shake gently to coat fillets. Marinate in refrigerator 30 minutes.
2. Prepare grill.
3. Coat grill rack with cooking spray; place on grill over hot coals (400° to 500°). Remove fish from marinade, reserving marinade. Place fish fillets on rack; grill, covered, 4 to 5 minutes on each side or until fish flakes easily when tested with a fork.
4. Place reserved marinade in a small saucepan, and bring to a boil; remove from heat. To serve, spoon hot marinade over fish.