Wash the cucumber thoroughly and cut it into fine slices with a slicer. Clean, wash, drain and halve the iceberg lettuce and cut into fine strips. Dice cheese. Mix all ingredients.
Wash the dill and chop it except for a few stems for decoration. Mix yoghurt and crème fraîche with dill. Season to taste with salt and pepper. Pour as sauce over the salad. Decorate with dill stems.