Authentic Bolognese Sauce

Name: Authentic Bolognese Sauce
Prep time: 10 min
Cook time: 5 h
Total time: 5 h 10 min
Cuisine: Italian
Ingredients: 1 Red onion (Brown. Chopped); 3 stalks Celery (Chopped); 3 Carrots (Chopped); 500 grams Pork (17.6oz. Mince); 300 grams Beef (10.5oz. Mince); 200 grams Veal (7.05oz. Mince); 1 L Italian tomato passata (4.2 cups); 400 grams Tomatoes (14.1oz. Peeled); 150 grams Tomato paste (5.29oz ); Extra virgin olive oil (EVOO); 1 glass Red wine ((Ex: Shiraz, Montepulciano, or Cabernet)); 1 mug Full cream milk; Salt and pepper; 1-2 L Water (to be boiled using the kettle)