Place the pork in 1 1/2 liters of cold water and cook until half-soft.
In the meantime, clean the savoy cabbage and cut into fine strips. Peel and roughly dice the onion. Add both and cook together with the meat.
Then take out the meat, cut it into small pieces (not necessary for canned meat, as it is added in cubes beforehand) and add it again. Finally, season the soup with salt and pepper.