Chourico Bolognese - edible Southeastern Massachusetts

Ingredients

• 1 medium onion (roughly chopped)
• 1 celery stalk (with some leaves, roughly chopped)
• 1 carrot (peeled and roughly chopped)
• 2 tablespoons extra virgin olive oil (or more as needed)
• 3 ounces pancetta (finely chopped)
• 1 pound ground chourico
• Freshly ground black pepper (to taste)
• 2 tablespoons tomato paste
• ½ cup white wine
• 2 to 3 cups low-sodium (or homemade beef stock, or more as needed)
• 1 bay leaf
• 1 cup whole milk (at room temperature)
• 1 pound fettuccine (pappardelle, or tagliatelle)
• Freshly grated Parmigiano-Reggiano (for serving)