Linguine with Bolognese Sauce

Bahan-bahan (6 porsi)

• 3 tablespoons extra virgin olive oil
• 1 tablespoon unsalted butter
• 1 medium onion, (chopped finely)
• 1 medium carrot, (chopped finely)
• 1 large celery stalk, (chopped finely)
• 1½ pounds lean ground beef
• 1 cup dry white wine
• 28 ounces canned crushed tomatoes
• 1¼ teaspoons kosher or sea salt
• ½ teaspoon freshly ground black pepper
• 2 whole bay leaves
• 1 cup whole milk
• ½ cup shredded Parmesan cheese, (plus more for serving)
• 16 ounces linguine pasta, (cooked to al dente (then drained))
• 2 tablespoons chopped fresh Italian parsley, (for serving)