1. Combine all ingredients except the tilapia in a plastic bag. Turn to mix and add tilapia fillets. Seal and refrigerate for 30 min. Preheat grill. Pour marinade into saucepan. Bring marinade to a low boil and remove from heat. Grill tilapia fillets for about 3 min per side over high heat. When fish turns opaque remove from grill and serve with a few spoonfuls of marinade drizzled over top.