Soup greens clean or peel, wash and cut into pieces. Peel 1 onion and dice it roughly. Bring vinegar, wine, 400 ml water, soup vegetables, onion, bay leaf and peppercorns to the boil and allow to cool. Put the meat in a freezer bag. Add the prepared marinade. Close the bag well. Marinate in the refrigerator for approx. 1 day. Turn the bag in between
Remove meat from the marinade and pat dry. Pour the marinade into a sieve. Collect the liquid. Peel 1 onion and chop very finely. Knead the mince and onion. Place the roulades next to each other on the work surface, spread the mince on the roulades and spread it as evenly as possible over the meat. Roll up the roulades and fix them with wooden skewers
Heat the oil in a frying pan. Fry the roulades in it while turning them, remove. Sauté the soup greens and onion in the frying fat for approx. 2 minutes. Deglaze with marinade. Put the meat back into the roaster and bring to the boil. Stew in closed roaster for approx. 2 hours
Peel and chop 2 onions. Apple quarter, remove core, peel and dice. Heat butter in a pot. Fry the onions for about 4 minutes. Add red cabbage and apple, bring to the boil and braise for about 20 minutes, stirring occasionally.
Form dumpling dough into dumplings and cook in boiling salted water according to package instructions. Remove the finished roulades. Cut cake into fine cubes. Pour jus through a fine sieve. Add the cake, bring to the boil and simmer for about 5 minutes, stirring, until the sauce has a creamy consistency. Season to taste with salt and pepper. Put the roulades back into the sauce. Arrange roulades, dumplings and red cabbage on plates
Waiting time approx. 12 hours