1. Melt 1 tablespoon of the butter in a large stockpot over medium high heat, and brown the sausage, crumbling it as it cooks. Once brown, remove sausage from pot with a slotted spoon and discard any grease that remains in the pot.
2. Melt remaining 1 tablespoon of butter in the same pot, and add the onion, garlic, carrot, and celery, and saute over medium heat until vegetables are soft, about 8 minutes. Add sausage back to the pot, add the can of diced tomatoes (do not drain), stir briefly, and simmer for 10 minutes.
3. Stir in the beans, and add the beef broth and tomato sauce. Add in all of the seasonings, stir well, turn the heat to high and bring the soup to a boil. Once it boils, turn down to low heat, cover, and simmer for at least 30 minutes.
4. Add the dry pasta and continue to simmer on low for another 30 minutes. Serve with your favorite bread or crackers.