For the meatballs: 1/2 pound ground veal 1/2 pound ground pork 1 pound ground beef 1 cup fresh white bread crumbs (4 slices, crusts removed) 1/4 cup seasoned dry bread crumbs 2 tablespoons chopped fresh flat-leaf parsley 1/2 cup freshly grated Parmesan cheese 2 teaspoons kosher salt 1/2 teaspoon freshly ground black pepper 1/4 teaspoon ground nutmeg 1 extra-large egg, beaten Vegetable oil Olive oil

For the sauce: 1 tablespoon good olive oil 1 cup chopped yellow onion (1 onion) 1 1/2 teaspoons minced garlic 1/2 cup good red wine, such as Chianti 1 (28-ounce) can crushed tomatoes, or plum tomatoes in puree, chopped 1 tablespoon chopped fresh flat-leaf parsley 1 1/2 teaspoons kosher salt 1/2 teaspoon freshly ground black pepper