Wash potatoes well and cook covered for about 20 minutes. Quench, peel and let cool down a little
Peel and finely chop the onion. Fry in 1 tablespoon of hot oil until translucent. Stir in 1/8 l water, vinegar and stock. Season to taste with mustard, salt and pepper. Cut potatoes into slices. Pour hot marinade over the potatoes and leave to stand for about 30 minutes.
Wash the schnitzel, dab dry and cut into small cubes. Cut the bacon slices into pieces. Put the schnitzel, bacon and olives alternately on skewers
Wash the tomatoes and cut into slices. Wash basil, shake dry, pluck off leaves. Mix both into the potatoes and season to taste
Heat 1-2 tablespoons of oil in a frying pan. Fry the skewers in it for about 8 minutes. Season with salt and pepper. Serve hot or cold with potato salad