Rinse the beetroot and cook in boiling water for about 40 minutes. In the meantime, wash and clean the salad and pat dry. Peel and finely chop the onion. Coarsely chop the walnuts. Mix horseradish and cream cheese.
Beat the oil into the vinegar, season with salt, pepper and 1 pinch of sugar. Drain the beetroot, rinse with cold water and peel. Cut the beetroot into slices. Mix salad and onion with the vinaigrette.
Arrange on a plate. Spread beetroot over it. With 2 tablespoons of the cream cheese mixture, prick the dumplings and place on the salad. Sprinkle with walnuts and coarse pepper. Serve the salad immediately.
It goes well with farmhouse bread.