Wash potatoes thoroughly and cook in the preheated oven (electric cooker: 200 °C/ circulating air: 175 °C/ gas: see manufacturer) for about 1 hour.
Clean, clean and halve the mushrooms. Remove the outer leaves from the pointed cabbage. Halve cabbage and cut into leaves. Peel and chop onion. Cut Kasseler into short strips.
Heat the oil in a large pan and fry the meat in it for about 10 minutes, turning. After about 4 minutes add vegetables. Season with salt and caraway seeds. Deglaze with 100 ml water and refine with sour cream.
Wash the chives, shake dry, cut into fine rolls. Take potatoes out of the oven, cut them in and press them apart. Put potatoes on plates and fill with ragout. Sprinkle with chives.