Soak the beans overnight. Cook the beans in unsalted water; this will take about 1 hour depending on the age of the beans.
Fry the sausage meat and Parma ham in the olive oil, add the celery, carrot, onion and garlic, and fry until soft. Add the tomato and gently cook for half an hour.
Drain the beans and add to the tomato sauce. Cook the beans and tomato sauce together for 15 minutes. Some of the beans will break up and thicken the sauce.
Serve this sauce with tagliatelle and Parmesan cheese.