Place mashed potatoes, egg and flour together in a large mixing bowl and mix together until a dough forms.
Place dough onto a floured surface and roll into a long log about 3-4cm in diameter and slice into 5-6cm dumplings using a sharp knife or bench scrapper.
In a large saucepan or pot, boil water and add 6-10 dumplings at a time to the boiling water and cook until they start to float at the top. Remove and place on a plate. Repeat with remaining dumplings.
You can serve as is or by making a pan sauce (or even just butter) in a skillet and tossing cooked dumplings in sauce until they become golden brown.
0 servings