Put into a saucepan three tablespoonfuls of butter, a small handful of
parsley chopped small, salt and pepper to taste. Stir up well until
hot, add a small teacupful of cream or rich milk, thicken with two
teaspoonfuls of flour, and stir until it boils. Chop some cold boiled
potatoes, put into the mixture, and boil up once before serving.