Traditional Bolognese Sauce

Ingredients

• 1 cup (236 ml) beef stock
• 1 cup (236ml) milk
• 3 1/2 cups (448 grams) good quality can tomato puree, 28 ounces
• 1 cup (236 ml) white wine, or red if you prefer
• 5 garlic cloves, grated or finely chopped
• 6 oz. (1 large) carrot, finely chopped
• 2 celery stalks, finely chopped
• 11 oz. (311 grams) large onion, finely chopped
• ¼ tsp. black pepper
• ½ tsp. salt
• 6 oz. (170 grams) pancetta, chopped finely
• 1 ½ pounds (680 grams) ground pork
• 1 ½ pounds (680 grams) 80/20 ground beef
• 1 tbsp. unsalted butter
• 1 tbsp. olive oil