Cook the potatoes in their skins, leave to cool, peel and cut into slices. Peel and chop the onions and add to the potatoes.
Boil the vegetable stock, mustard, honey, salt, pepper and a little herb vinegar into a stock, let it cool down a little and pour over the potatoes. Let the lettuce steep for 3 hours, but preferably overnight.
Then cut or chop the cucumbers and herbs. Mix with the apple, bell pepper and sour cream or sour cream. Stir the mixture into the potatoes, season again to taste.