Peel the onions. Cut 1 onion into very small cubes. Peel the carrot and cut it into small cubes. Peel and wash the potatoes and cut them into cubes of about 2 cm. Melt the fat in a saucepan and fry the diced onion and carrot.
Add bay leaves, potato cubes and stock and bring to the boil. Cook soup in a closed pot at low heat for about 15 minutes. Cut 2 onions into rings. Heat oil in a large pan. Fry the sausages on medium heat all around. After 3 minutes add the onion rings and fry them. Rinse the marjoram, dab dry and remove the leaves. Remove bay leaves from the soup. Mash the vegetables in the soup with a potato masher. Bring the soup to the boil and season to taste with salt, pepper and nutmeg.
After 3 minutes add the onion rings and fry them. Rinse the marjoram, dab dry and remove the leaves. Remove bay leaves from the soup. Mash the vegetables in the soup with a potato masher. Bring the soup to the boil and season to taste with salt, pepper and nutmeg. Cut sausages into wide slices. Serve the soup in portions with onion rings, sausage slices and marjoram leaves