Potatoes au Maître d’Hôtel.
Slice cold boiled potatoes a quarter of an inch thick, and put into a saucepan containing enough milk, already heated, to cover them—barely. When all are smoking hot, add a tablespoonful or more of butter, pepper, salt, and minced parsley. Add a teaspoonful of flour wet in cold water; heat quickly to a boil; put in the juice of half a lemon; pour into a deep dish without further cooking.