In a blender, puree the garlic, lime juice, salt and pepper until smooth. Add melted butter and blend another 30 seconds. Season salmon fillets all over with salt and pepper. Grill over medium heat on lightly oiled grill rack 4 to 6 minutes (cover if using gas grill.) I used the Flavorwave Oven. Turn fillets over and grill until just cooked through, 4 to 6 minutes more. Sprinkle fillets with lime zest and cilantro and then top with the lime butter sauce.