Add Minute Tapioca, sugar, and salt to milk and cook in double boiler 15 minutes or until tapioca is clear, stirring frequently. Pour a small amount of tapioca mixture over egg yolks, stirring vigorously. Return to double boiler, add 4 tablespoons coconut, and cook until slightly thickened. Pour into greased baking dish. Fold sugar into egg whites and pile lightly on top of tapioca mixture. Sprinkle with remaining coconut and bake in slow oven (300 degrees F) 15 minutes or until golden brown. Serves 8.