The Best Spicy Spaghetti Bolognese - Serving Dumplings

Ingredients

• 14 ounces spaghetti
• 1 tbsp olive oil
• 1 tbsp unsalted butter
• 1 yellow onion (finely chopped)
• 6 garlic cloves (minced)
• 1 medium carrot (finely diced)
• 1 celery stalk (finely diced)
• 3.5 ounces pancetta
• 1.1 pounds ground meat mixture (pork/veal)
• 1 tsp salt
• 1 tsp black pepper
• 1 tsp sugar
• 3 ounces 'Nduja
• ½ cup red wine
• 3 tbsp double concentrated tomato paste
• 3 ½ cups puréed tomatoes
• 2 bay leaves
• ½ cup whole milk
• 1.5 ounces grated Parmesan