Bolognese Sauce Recipe - Authentic Italian Meat Sauce

Ingredients

• 1 medium onion
• 1 large or 2 small carrots
• 2 to 3 stalks celery
• 1 oz (28 g) pancetta, finely chopped
• 1 lb (454 g) ground beef (not lean)
• 1 tbsp salt
• 1/8 tbsp freshly ground pepper
• pinch of allspice
• 1 cup whole milk
• 1 cup dry white wine
• 1 can diced tomatoes, with their liquid
• 1 lb (454 g) pasta, such as rigatoni
• parmigiano reggiano cheese for grating