Wash the potatoes thoroughly and boil them in water covered with skin for about 20 minutes.
In the meantime, wash the herbs for the sauce and shake dry. Cut the chives into fine rolls. Finely chop or cut the remaining herbs. Mix yoghurt, sour cream and mayonnaise. Stir in the herbs.
Season to taste with salt and pepper.
Pick the eggs. Cook in boiling water for about 8 minutes until soft. In the meantime, wash and peel the cucumber for the salad, cut it in half lengthwise and cut it into coarse slices. Mix lemon juice with salt, pepper and 1-1 1⁄2 tsp. sugar.
Add oil. Mix with the cucumber.
Drain the potatoes. Drain eggs, quench, peel and halve. Arrange potatoes, eggs and herb sauce. Add cucumber salad.