Bolognese Meat Sauce

Name: Bolognese Meat Sauce
Ingredients: 2 oz. Diced pancetta, finely chopped; 1 Medium Spanish onion or yellow onion, finely chopped; 1 Stalk celery, finely chopped; 1 Carrot, finely chopped; 3 Tbsp unsalted butter; 11 oz Ground beef; 4 oz Ground pork; 4 oz Ground Italian sausage; 1 freshly ground clove; Dash of freshly ground cinnamon; 1 tsp freshly ground black pepper; 2 lb peeled and chopped tomatoes (or 1 28-oz can whole peeled tomatoes, packed in water); 1 cup whole milk; 1/2 teaspoon sea salt