Bolognese Sauce

INGREDIENTS

• 2 Tbs. olive oil
• 1 1/4 lb. ground beef
• 1 1/4 lb. ground pork
• Kosher salt and freshly ground pepper, to taste
• 4 oz. pancetta, cut into 1/2-inch dice
• 1 yellow onion, finely diced
• 2 carrots, peeled and finely diced
• 1 celery stalk, finely diced
• 5 garlic cloves, minced
• 1/3 cup tomato paste
• 1 cup dry red wine
• 1 cup milk
• 2 cans (each 28 oz.) whole tomatoes, passed through a food mill
• 2 bay leaves
• 1 Parmigiano-Reggiano cheese rind
• 1 lb. tagliatelle, cooked
• Grated Parmigiano-Reggiano cheese for serving