Peel and quarter the onion. Heat the oil in a frying pan and fry the smoked pork in it briefly while turning. Add the onion, pour on 1/4 litre of water and braise covered for about 20 minutes.
In the meantime clean, wash and drain the peppers. Dice the peppers roughly. Clean, wash and cut spring onions into fine rings. Mix paprika and spring onions into the finished potato salad.
If necessary, stir with a little milk to make it smoother and season to taste with vinegar. Remove the pork loin from the pan and let it rest for about 5 minutes. Then cut into thin slices. Put the potato salad in a bowl and arrange the smoked pork loin on top.
Serve garnished with fresh herbs.