Potatoes au Maître d’Hôtel.
Put a cup of milk into a saucepan, and when it heats, stir in two tablespoonfuls of butter rolled in flour, with salt, pepper, and chopped parsley; then about two cupfuls cold boiled potatoes, sliced rather thick. Heat scalding hot, take from the fire and add a pinch of grated lemon-peel with the juice of half a lemon. Serve in a deep dish.