Mix all ingredients for meatballs, adding a little water if too dry. Shape into 50 meatballs, allowing 1/3 cup for each meatball. Put balls, one layer deep in 3 pans 13x9x2 inches. Bake in preheated very hot oven [450°F] for about 30 minutes. Put balls and dripping in roasting pan.
To make sauce, cook onion and garlic in oil for 5 minutes. Add all other ingredients. Cover and simmer for 30 minutes.
Pour over balls and bake covered in preheated oven [350°F] for 1 1/2 hours.
Cook 4 pounds spaghetti and serve with parmesan cheese.