Peel, wash and dice the potatoes and carrots. Peel and chop the onion. Heat oil in a pot. Fry potatoes, carrots and onion. Add the beans. Pour in broth, bring to the boil and cook over medium heat for about 15 minutes.
Cut the cabanossi into slices, add to the vegetables and cook for another 5 minutes. Wash and finely chop the parsley. Season potato soup with salt and pepper. Serve sprinkled with parsley. Serve with farmhouse bread.