Cut bread into slices one half inch thick; stamp them with a biscuit cutter into circles; then, moving the cutter to one side, cut them into crescent form; or, if preferred, cut the bread into strips three inches long and one and one half inches wide; saute them in a little butter on both sides to an amber color. Cover them with a thick layer of grated cheese; sprinkle with salt, pepper, and dash of cayenne. Fifteen minutes before the time to serve, place them in the oven to soften the cheese. Serve at once very hot; or, cut some toasted bread into small triangles; spread with a little French mustard; dip in melted butter; then roll in grated cheese; sprinkle with salt, pepper, and dash of cayenne, and place in a hot oven for a few minutes to soften the cheese. Serve at once on a hot dish.