Sauté the Soffritto: Heat the olive oil in a large, heavy-bottomed pot or Dutch oven over medium heat. Add the finely diced onion, carrots, and celery. Sauté gently for 10-12 minutes, stirring occasionally, until the vegetables have softened and taken on a slightly translucent, golden hue and you can smell their sweet aroma. This is the foundation of your flavour.

Brown the Mince: Increase the heat to medium-high. Add the beef and lamb mince to the pot, breaking it up with a wooden spoon. Cook, stirring frequently, for 8-10 minutes, until the meat is evenly browned all over and no pink remains. You'll hear a satisfying sizzle and see a lovely caramelisation forming at the bottom of the pan. Drain off any excess fat if necessary.

Add Dairy for Tenderness: Pour in the full-fat milk. Bring it to a gentle simmer and cook for 5-7 minutes, stirring occasionally, until the milk has almost completely evaporated and absorbed into the meat. The mixture will look creamier and the meat will become incredibly tender.

Build the Tomato Base: Stir in the tomato purée and cook for 2 minutes, allowing it to deepen in colour and release its flavour. Then, add the chopped tomatoes and beef stock. Stir well to combine, scraping up any delicious browned bits from the bottom of the pot. The sauce will look quite liquid at this stage, a vibrant red.

Simmer and Season: Add the bay leaves and freshly grated nutmeg. Bring the sauce to a gentle simmer, then reduce the heat to very low, cover with a lid, and cook for at least 3 hours, or up to 4 hours. Stir the sauce every 30-45 minutes to prevent sticking and ensure even cooking. During this long simmer, the sauce will thicken considerably, deepen to a rich, dark red-brown, and emit an intoxicating aroma that fills your kitchen. Taste and adjust seasoning with salt and freshly ground black pepper towards the end of the cooking time.

Prepare and Serve: Cook your chosen pasta (tagliatelle or pappardelle are excellent choices) according to package instructions in plenty of salted water. Before draining, reserve about 100ml of the starchy pasta water. Remove the bay leaves from the Bolognese sauce. Toss the drained pasta directly with the sauce, adding a splash of the reserved pasta water if needed to achieve a glossy, well-coated consistency. Serve immediately in warm bowls, generously garnished with freshly grated Parmesan cheese and a sprinkle of chopped fresh parsley.