Make the meatballs according to the directions and set aside. In a large heavy bottom pot put in olive oil. Brown the sausages on all sides and remove. Saute onion till soft and add garlic. Add tomato paste and let cook for one minute. Add tomatoes, sausages, meatballs, basil and a sprinkle of salt and pepper. Bring to a boil and reduce heat and simmer for 2-3 hours covered. Make sure you keep stirring to make sure the bottom does not burn. When you have it simmering, stir occasionally to make sure it is not burning.
When you make gravy it is very important that you use a pot that has a thick, heavy bottom. This prevents it from burning.