1. Mix the bread crumbs, eggs, salt, pepper, and sugar together with the ground meat.
2. In a six-quart pot, sauté onions for sauce; add the rest of the sauce ingredients. Bring to a boil, then lower to a simmer. In the meantime, form the meatballs.
3. Form the meat mixture into small balls, add to pot and cook in the sauce for one and a half to two hours.