1. Juice the 2 limes; reserve 1/4 cup juice. Combine juice, 1/4 cup melted butter, shrimp, and pepper.

2. Place fish in single layer on rack of unheated broiler pan. Broil 4 inches from heat for 3 minutes. Spoon shrimp mixture over fillets. Broil for 2 to 3 minutes more or till the fish is done.

3. To serve, juice remaining 2 limes to get about 1/4 cup; heat juice. Spoon the hot lime juice onto 6 heated dinner plates. Place fish and sauce on plates. Drizzle with the remaining 3 tablespoons of melted butter.