Klöße / Knödel (dumplings) can be made out of potatoes. But there are different ways to make them, for example out of rolls and/or Brezeln. Those are my favourite! Add a mushroom sauce on top and be happy!
For 6 dumplings you need:
6 rolls (they can also be dry, so it’s a good way to use leftovers!)
about 4-6oz milk (100-150ml)
a small onion
1 or 2 tbsp butter
2 tbsp parsley
2 eggs
nutmeg, pepper, salt
Stew the onion (small cubes) with butter, add parsley. Mix it with the cut rolls (cubes or thin slices) which you’ve already soaked with milk. Add the spices. If the mix is too wet, add a bit of flour.
Shape dumplings, roll them in flour and then let them simmer for about 20mins (lid on top, but not fully closed). (pic via kuechengoetter.de)