Wash the potatoes and boil in water for about 20 minutes. Quench, peel and let cool
Wash the meat and pat dry. Brown in hot clarified butter in a casserole. Deglaze with 1/4 l water. Cover and braise for about 1 hour
Peel and finely chop the onion. Boil up in the stock. Cut potatoes into slices and pour the stock over them. Leave to stand for about 40 minutes.
Mix mayonnaise, yoghurt, mustard and cucumber stock. Season to taste with vinegar, sugar, salt and pepper. Wash the tomatoes and cut them into slices. Cut cucumbers into slices. Mix everything into the potatoes and season to taste
Wash the parsley and chop finely. Remove the cured pork loin and cut it open. Sprinkle with pepper and arrange with the potato salad. Sprinkle with parsley