1. Stir together first 12 ingredients in a bowl, and refrigerate until needed.
2. Season fish on both sides with salt and pepper. Coat a grill tray with cooking spray, and place on grill rack. Heat, covered with grill lid, over hot coals (400º-500º) for 10 minutes. Place fish on tray, and grill over medium-high heat 8 minutes on each side. Serve fish hot, topped with cold or room-temperature sauce.