First, cover the smoked meat with water in a large pot and boil for about 1 1/2 hours.
In the meantime, prepare the potato dough according to the basic recipe.
Peel and finely chop the onion. Chop the smoked meat into small pieces.
Heat the oil in a pan and sauté the onion cubes in it. Add smoked meat and season with salt, pepper, marjoram and caraway seeds. Stir in eggs.
Form the potato dough into a roll and cut off pieces of equal size. Flatten on the palm of your hand, put some filling in the middle and form into a dumpling.
Bring salted water to a boil and let the dumplings steep in it for about 20 minutes (do not boil until bubbling).
Serve the selchfleisch dumplings.