Cut the top half off the loaf of bread; carefully hollow out top and bottom, leaving a 1/2-inch shell (save removed bread for another use). Microwave fish fillets according to package directions. Meanwhile, combine butter and garlic; spread over cut sides of bread. In bread bottom, layer fish, red peppers and cheese. Replace bread top. Wrap loaf in foil. Bake at 350° for 15-20 minutes or until cheese is melted. Slice and serve immediately.