The day before, mix yoghurt and 1 level teaspoon of salt. Put kitchen paper in a sieve. Carefully add the yoghurt and leave to drain overnight. Clean and wash the rocket, finely chop 1/3 of the rocket and fold into the yoghurt. Clean and wash the radishes and cut them into slices except for 4.
Peel kohlrabi and cut into thin sticks. Wash and drain the sprouts. Peel and finely chop the onion. Mix vinegar with salt, pepper and sugar. Whip oil into it, add onion. Cut bread slices in half. Heat the fat. Fry slices of bread in it until golden brown. Mix radishes, remaining rocket, kohlrabi and sprouts with the marinade. Arrange salad on plates.
Heat the fat. Fry slices of bread in it until golden brown. Mix radishes, remaining rocket, kohlrabi and sprouts with the marinade. Arrange salad on plates. Cut 8 balls from the yoghurt mixture with an ice-cream scoop or 2 tablespoons and place them on the bread slices. Arrange the slices of bread on the salad. Garnish with radishes
Waiting time approx. 12 hours