Cook potatoes in salted water just until tender drain Refrigerate for 2 hours or overnight Peel and grate potatoes In a bowl combine the flour egg salt and nutmeg Add potatoes and mix until a stiff batter is formed adding additional flour if necessary Slice toasted bread into 24 squares 12-inch each shape 2 tablespoons of the potato mixture around 2 bread squares forming 2-inch balls In a large kettle bring salted water to a boil add the dumplings Return to a boil reduce heat Cover and simmer for 15 to 20 minutes or until
dumplings are no longer sticky in the center Remove with a slotted spoon to a serving bowl If desired drizzle with butter and sprinkle with crumbs Yields 6 to 8 servings