Wash the potatoes thoroughly and cook them with their skins for about 20 minutes. Drain the sauerkraut in a sieve. Clean, wash and cut the leek into pieces of approx. 6 cm length, cut them in half lengthwise.
Cut the cabanossi into cubes. Drain potatoes, rinse with cold water and peel. Cut potatoes into thick slices. Heat 20 g clarified butter in a large pan. Fry the leek for about 5 minutes while turning.
Remove from the pan. Melt 20 g lard in the pan and fry the potato slices until crispy and golden brown. Add leek, cabanossi and sauerkraut. Season with salt, pepper and paprika. Serve in the pan.
Add crème fraiche.