1. Brown livers lightly in oil. Salt and pepper to taste. Remove from oil and chop fine.
2. Saute onion and garlic in same pan and oil until onion is transparent. Add broth, tomato sauce, tomato paste, seasonings and chopped livers. Cover and simmer for 1 hour. Stir occasionally. Season to taste.
3. Serve over cooked spaghetti and top with grated Parmesan or Romano cheese.