Put the leg slice in 1 1/4 litre of cold salt water. Clean, wash and cut the soup greens into large pieces. Peel and quarter 2 onions. Also add to salt water. Leave to simmer for about 2 hours.
In the meantime, clean and wash the vegetables. Peel carrots and potatoes. Divide the cauliflower into small sprouts. Cut carrots into thick slices. Roughly dice the potatoes. Cut the beans into pieces.
For the dumplings, peel the remaining onion and dice finely. Mix with egg yolk and ground pork and season with salt and pepper. Form small dumplings from it. Heat the oil in a pan. Fry the dumplings for about 4 minutes.
Remove the meat from the broth and pour the broth through a sieve lined with a cloth. Cook the prepared vegetables in the broth for about 15 minutes. Peas, chervil leaves and
Season everything with salt and pepper. Cut the meat into small pieces if necessary and stir in.