Marcella Hazan Bolognese | Italian | Umami

Ingredients

• 2 tablespoons extra virgin olive oil
• 2 tablespoons unsalted butter
• 1 cup (160g) small dice yellow onion (about ½ medium yellow onion)
• kosher salt (to taste)
• 1 cup (120g) small dice celery (about 2 large celery stalks)
• 1 cup (140g) small dice carrot (about 2 medium carrots)
• 3 large garlic cloves (finely chopped)
• ¼ teaspoon dried red pepper flakes (optional)
• 1 lb (16 oz) ground beef (preferably 80% lean/20% fat (min. 15% fat)
• freshly ground black pepper (to taste)
• 1 cup (240 mL) whole milk
• ¼ teaspoon freshly grated nutmeg
• 1 cup (240 mL) dry white wine (Pinot Grigio or Sauvignon Blanc)
• 1 (28-ounce) can whole or crushed Italian plum tomatoes in their juices (see recipe notes)
• 2-3 parmigiano-reggiano rinds