Boil whole potatoes with their skins in salted water, peel and chill. Cut the potatoes into slices.
Finely dice the onions and bacon.
Fry the bacon in a pan over medium heat.
Divide the potatoes into four parts. Put some of the potato slices in a large bowl as the first layer. Season the layer with salt, pepper and a little sugar and sprinkle with a quarter of the onions. Spread 1 tablespoon of oil, a little vinegar and 1 tablespoon of meat stock on top. Repeat everything 4 times and stir in gently.
Chill the salad for several hours and stir gently from time to time. Possibly add a little more meat stock. Add the bacon and fold in.
Before serving, fold in the sour cream and herbs carefully so that they don`t muddy.