Wash potatoes thoroughly and cook in boiling water for about 20 minutes. Boil eggs for about 8 minutes. Clean and wash radishes and, except for a few for garnishing, cut them into fine sticks.
Wash and grate the cucumber. Mix quark, yoghurt, radish and cucumber. Season with salt, pepper and lemon juice. Wash herbs and chop finely. Also stir into the quark. Drain and peel the potatoes.
Peel and halve the eggs. Arrange potatoes with the herb curd cheese and a halved egg on plates in portions. Garnish with radishes.