Quarter the savoy cabbage, cut off the outer leaves and the stalk. Cut the savoy cabbage into medium sized leaves. Drain the pumpkin and cut it a little smaller. Peel and wash the potatoes and cut into bite-sized pieces.
Peel and chop the onion. Heat the oil in a pot and sauté the onion in it. Add potatoes and savoy cabbage and fill up with the stock. Let simmer for about 10 minutes. In the meantime, wash the coriander, dab dry and chop finely, except for a little to garnish.
Mix the sausage meat, coriander and lemon peel. Form small dumplings from the meat with two teaspoons, add them to the soup and let them simmer for about 5 minutes. Add pumpkin to the soup, bring to the boil again and season with salt, pepper and nutmeg.
Serve garnished with remaining coriander.