These little potato dumplings are considered pure comfort food in Poland. They are usually made with leftover boiled potatoes. Serve them sprinkled with sugar or with a dollop of cream. If you prefer something more savoury, serve them with a mushroom sauce.
If you made more dumplings than you can eat, simply boil them all and transfer into a bowl. Pour over melted butter and cool; store them in the fridge. The next day, drop them into boiling water for up and warm through.