Clean, peel and wash the carrots and kohlrabi. Put some kohlrabigrün aside. Cut the carrots in half lengthwise. Cut the kohlrabi into slices. Cook vegetables in boiling salted water for about 10 minutes.
Peel, wash and slice the potatoes. Heat oil in a pan. Fry the potatoes for about 15 minutes at medium heat, turning them golden brown. Sprinkle meat with salt and pepper. Wash the marjoram, dab dry and, except for something to garnish, lay it on the meat, fold it over and pin it down with wooden skewers. Push the potatoes together slightly and fry the meat on both sides for 3 minutes each. Froth butter. Wash the kohlrabigrün and cut into fine strips. Arrange vegetables, meat and potatoes on a plate. Pour butter over the vegetables.
Push the potatoes together slightly and fry the meat on both sides for 3 minutes each. Froth butter. Wash the kohlrabigrün and cut into fine strips. Arrange vegetables, meat and potatoes on a plate. Pour butter over the vegetables. Sprinkle with kohlrabigrün and coloured pepper. Garnish with remaining marjoram