Wash the cured pork, dab dry and cut into cubes. Peel and wash carrots and cut them diagonally into slices. Clean and quarter the savoy cabbage and remove the stalk. Wash cabbage quarters and cut into strips. Peel and finely chop the onion. Heat the oil in a pot and fry the onion until transparent. Add the smoked pork and fry for 2-3 minutes.
Fry carrots and savoy cabbage briefly. Season with salt and pepper. Add stock and simmer for 10-15 minutes. Add spaetzle and let it simmer for 2 minutes. Stir crème fraîche until smooth and add it to the soup as a blob. Sprinkle with fried onions