Potato Cakes
["2 lb. potatoes", "salt and pepper", "3 egg yolks", "5 egg whites, stiffly beaten"]
["Peel and boil potatoes.", "Mash well. Add salt, pepper and egg yolks.", "Mix.", "Fold in the beaten egg whites.", "Place mixture in a well-greased pan and bake for 35 to 40 minutes in a preheated oven at 400\u00b0.", "Cut in squares and serve hot with meat and other vegetables."]
["potatoes", "salt", "egg yolks", "egg whites"]