Authentic Tagliatelle al Ragù alla Bolognese Recipe Bologna, Italy

Name: Pellegrino Artusi's Maccheroni alla Bolognese
Prep time: 10 min
Cook time: 2 h
Yield: 4 servings
Cuisine: Italian
Ingredients: 40g (2 tbsp + 2 tsp) butter; 50g (1.75 oz) pancetta (cured and unsalted), finely chopped; 1/4 onion, finely diced; 1/2 carrot, finely diced; 2 palm-length celery ribs, finely diced; 150g (5.3 oz) lean veal, finely diced; a pinch of flour; beef stock, as needed; salt, pepper, and nutmeg, to taste; 500g (1.1 lb) pasta, originally denti di cavallo; dried mushrooms or truffles (optional); cooked chicken liver (optional); 120 ml (1/2 cup) cooking cream (optional); grated Parmigiano Reggiano, for serving