Wash the potatoes and cook in boiling water for about 25 minutes. Drain potatoes, quench, peel and let cool. Boil eggs in boiling water for about 10 minutes, drain, quench, peel and let cool.
Peel and finely chop the onion. Drain the cucumbers and collect the stock. Cut the cucumbers into slices. Boil up broth, 4 tablespoons cucumber water and onion. Cut potatoes into slices, pour the stock over them and let them soak a little.
Mix yoghurt and mayonnaise, season with salt, pepper and sugar. Fold into the potatoes, season again. Wash the chives, shake dry and cut into small rolls. Cut the eggs into eight pieces.
Fold the eggs and chives into the salad. Heat the sausages in water. Arrange potato salad with sausages on plates.