Onions peel and quarter. Wash the meat. Boil both with 3 litres of water, 1 tablespoon salt and peppercorns in a large pot. Simmer at low heat for about 2 1/2 hours.
Skim foam more often with a skimmer. Clean or peel and wash the soup greens. Put 1 carrot aside for the filling. Coarsely chop the remaining soup vegetables, add them to the meat in the stock and cook with the meat.
For the egg whisk eggs, milk, salt and nutmeg. Pour up to 2/3 high into 2 greased cups. Seal with aluminium foil and press down well on the rim of the cup. Place the cups in a pot and pour on so much hot water that about 2/3 of the cups are in water.
First bring to the boil 1x, then cover and allow to set at low heat for 30-35 minutes. Turn over the eggs and cut them into slices, then into rhombs. Wash and peel the asparagus and cut off the woody ends.
Cut the asparagus into bite-sized pieces, the remaining carrot into thin slices. Remove the meat from the stock and let it cool down a little. Pour stock through a fine sieve into another large pot, bring to the boil.
Cook the asparagus and carrot for 10-12 minutes. Remove meat from fat and bones and dice finely. Press the sausage mixture as dumplings from the skin directly into the soup. Cook with the peas for about 5 minutes, season to taste.
Heat the egg and meat in it. Wash and finely chop the parsley. Sprinkle soup with parsley.