Peel and quarter the onion. Heat the oil in a tall pan with a lid or a pot. Fry the smoked pork in it briefly and thoroughly all around. Add the onion and pour on approx. 1/4 l water. Cover and braise for about 20 minutes.
Clean, wash and cut the peppers into small pieces. Leek onions clean, wash and cut into fine rings. Fold both into the potato salad. Season to taste with salt, pepper and possibly vinegar
Remove the cured pork loin and cut into thin slices. Serve with the pepper and potato salad