Put the eggs in boiling water and boil them hard for about 9 minutes. In the meantime, mix yoghurt and salad cream for the sauce. Season with salt, pepper, sugar and lemon juice. Clean and wash the radishes and cut them in half as desired.
Drain the eggs, rinse with cold water, remove the shell. Cut the eggs into slices with an egg slicer. Wash cucumber and cut into thin slices. Clean and wash the salad, pluck into bite-sized pieces and drain well on a sieve.
Cut the cress from the bed, wash and drain well. Arrange lettuce, cucumber, radishes, eggs and cress on four plates and spread the sauce over them. Serve sprinkled with pepper to taste.