Cut kohlrabi, carrots, potatoes and celery into approx. 7 mm thin strips, halve young onions, mix the vegetables and place in a perforated cooking tray. (The choice of vegetables used can be quite individual.
Season steaks heartily on both sides with salt and pepper and also place in a perforated, lightly greased cooking dish.
Mix egg yolk with 1 tablespoon of cream. Mix beef broth and remaining cream, add diced white bread, bring to a boil and cook for 2 minutes. Add grated horseradish and mix finely with a hand blender. Whisk in yolk-cream mixture quickly, season with salt and pepper, do not bring to the boil again. Arrange the steaks on the vegetables, pour a little horseradish sauce on the side and serve with chives.