Wash the meat thoroughly. Peel and halve the vegetable onion. Clean, wash and peel the carrots. Boil up broth, onion, juniper berries, carrots, cloves, peppercorns and knuckle of pork. Simmer knuckle of pork over medium heat for about 1 hour.
Remove the knuckle of pork from the stock and drain. Place the knuckle of pork on the fat pan of the oven and bake in the preheated oven (electric oven: 200 °C/ gas: level 3) for 40-45 minutes. 10 minutes before the end of the baking time, brush the knuckle with mustard.
In the meantime peel and chop the onions. Clean and wash the leek and peppers. Cut the leek into rings and the paprika into pieces. Heat the oil in a casserole, fry the onions, leek and peppers.
Add the sauerkraut and bay leaf, mix, deglaze with juice and braise at low heat for about 20 minutes while turning. Season sauerkraut with salt, pepper and sugar. Wash parsley, dab dry and chop finely.
Arrange the sauerkraut and knuckle of pork on a plate, sprinkled with parsley. Serve garnished with parsley leaves as desired. Boiled potatoes taste good with it.