Prepare a marinade from 350 ml of wine, vinegar, 3 cloves, juniper berries, allspice seeds, bay leaf, mustard seeds and salt, bring to the boil briefly and allow to cool. Then put the meat in it so that it is completely covered and let it steep in the refrigerator for at least 2 days.
Cut the vegetables into large cubes. Remove the meat from the marinade, pat dry and fry all over in hot fat. Add the diced vegetables and brown a little. Add the tomato paste and let it take some color. Deglaze with the rest of the red wine and about 100 ml of the stain.
Simmer the meat gently over a low heat for about 2.5 hours. Then remove the meat from the sauce and cut into slices. Pour the meat stock through a sieve. Now grate the sauce gingerbread, stir in with a whisk and bring to the boil. Season the sauce with a little sugar, salt and pepper. Put the meat slices back in the sauce and keep warm.