Peel and wash kohlrabi, carrots and potatoes. Cut kohlrabi and potatoes into pieces. Cut carrots into slices. Boil 3/4 litre of water. Stir in onion soup powder. Add potato, carrots and kohlrabi. Cook everything on low heat for ten minutes.
Add peas after five minutes. Press the meat mixture out of the skin as small dumplings. Heat the oil in a pan and fry the dumplings in it until golden brown, turning them over. Wash parsley, dab dry and chop finely. Add the dumplings to the soup and let them simmer for another two minutes. Season to taste with pepper and serve sprinkled with parsley.