Lyonnaise Potatoes I

Cook five minutes three tablespoons butter with one small onion cut in thin slices; add three cold boiled potatoes cut in one-fourth inch slices and sprinkled with salt and pepper; stir until well mixed with onion and butter; let stand until potato is brown underneath, fold, and turn on a hot platter. This dish is much improved and potatoes brown better by addition of two tablespoons Brown Stock. Sprinkle with finely chopped parsley if desired.