Spaghetti and Meatballs

INGREDIENTS

• 2 cans (28 oz. each) plum tomatoes with purée, preferably San Marzano
• 3 Tbs. olive oil
• 1 large finely diced yellow onion
• 2 to 4 cloves garlic, minced
• 1/2 cup hearty red wine
• 1/4 tsp. red pepper flakes
• 1 bay leaf
• 1/4 cup chopped fresh basil
• 1 Tbs. olive oil
• 1/2 cup minced yellow onion
• 2 cloves garlic, minced
• 3/4 cup coarse fresh bread crumbs
• 1/2 cup whole milk
• 1 egg, beaten
• 2 Tbs. minced fresh flat-leaf parsley
• 1 1/2 tsp. dried oregano
• 1 1/2 tsp. kosher salt
• 1/2 tsp. freshly ground pepper
• 1 lb. ground beef round
• 1/2 lb. ground pork
• 1/2 lb. ground veal
• 1 lb. spaghetti
• Freshly grated Parmigiano-Reggiano cheese for serving