Sprinkle red snapper inside and out with salt and pepper. In a bowl mix butter and lemon rind. Brush red snapper on all sides with butter mixture. Place fish on a square of foil. Drizzle remaining butter over snapper. Sprinkle with remaining ingredients. Seal foil tightly.
Bake in a preheated 350 degree oven for 35-40 minutes. Turn back foil and place on a serving platter. Garnish with lemon slices, if desired. Serves 4-6.
Or any firm fleshed whole fish: salmon, bass, pike, etc.