Pour the left-over breakfast porridge into a square mold and stand it aside. At luncheon or dinner time cut this into thin slices, cover the bottom of a baking dish with these slices, and cover these with sliced apples, and so continue until you have the ingredients used, having the last layer apples. Beat an egg, without separating, until light, add a half cupful of milk and a saltspoonful of salt, then stir in a half cupful of flour. When smooth pour this over the apples and bake in a quick oven a half hour. Serve with milk or with hard sauce.