Peel and wash the potatoes, cut into fine slices and dab dry. Heat clarified butter in a casserole. Fry the potatoes for about 12 minutes until crispy. Season with salt and pepper.
Cut Kabanossi into thin slices. Drain the sauerkraut. Clean and wash spring onions and bell peppers and cut them into pieces.
Add Kabanossi to the potatoes and fry for about 3 minutes. Add vegetables and sauerkraut and fry for another 5 minutes. Season everything with salt and pepper. Mix sour cream and mustard and add to it.