Peel and wash the potatoes, grate them finely and press them out well in a kitchen towel. Bring milk, 20 g butter and salt to the boil in a saucepan. Remove from heat, add semolina while stirring and bring to the boil again briefly.
Let it cool down a little. Add the potatoes and knead well. Cut rolls into 8 cubes. Heat 20 g butter and roast the bread cubes all around in it until golden brown. Form 8 dumplings from the dumpling dough, press a bread roll crouton into it and form it round again.
Place in boiling salted water and cook over low heat for about 25 minutes. In the meantime peel and dice the onion. Heat 2 tablespoons of oil in a pan and sauté the onion in it.
Drain the sauerkraut, squeeze well and add to the onions. Fry over medium heat for about 5 minutes. Add bay leaves, juniper berries and cloves and season everything with salt and pepper.
Deglaze with wine and braise at low heat for 12-15 minutes. In the meantime, cut the bacon into small cubes and fry them crisply in a pan without fat. Cut plums into small pieces, add to bacon and mix.
Let it cool down. Spread plum-bacon mixture on the slices of pork and roll up. Stick together with wooden skewers. Heat the remaining oil in a frying pan and fry the slices of smoked pork on all sides over a medium heat for 10-12 minutes.
Remove the dumplings and let them drain. Arrange on a plate together with sauerkraut and the smoked pork rolls. Foam remaining butter and pour over the dumplings. Serve garnished with parsley as desired.