Wash the shank and let it cook. Wash and peel all vegetables.
An hour after the broth boils, add peeled carrots, onions, and peppercorns. Trim the dill and parsley stems and add to the broth.
After 3 hours of cooking, remove the cooked meat, carrots, onions, dill and parsley stems. Separate the knuckle from the bone. Set aside the cooked carrots and do not throw them away.
Cut the meat and send it back to the broth. Cut the peeled potatoes into cubes and add to the meat. Cut the onion into strips and start frying in vegetable oil. Add tomato paste, chopped garlic, and previously cooked carrots to the onion. Fry vegetables for 10 minutes.
Add the resulting frying to the pan, followed by the sauerkraut. Add sugar to taste if the cabbage is too sour. Let it boil and add bay leaf and chopped herbs.
Pour the finished dish into plates and serve with sour cream and finely chopped herbs.