Lee Ann's Caramelised Ragu with Hidden Veg

Name: Lee Ann's Caramelised Ragu with Hidden Veg
Prep time: 30 min
Cook time: 1 h 30 min
Total time: 2 h
Yield: 8
Cuisine: Italian
Ingredients: 15g dried porcini mushrooms (optional); 3 carrots, roughly chopped; 4 celery stalks, roughly chopped; 1 leek, trimmed, washed, roughly chopped; 2 zucchini, roughly chopped; 2 x 400g cans whole peeled tomatoes; 2 tbsp extra virgin olive oil; 500g beef mince; 500g pork mince; 150g middle bacon rashers, trimmed, chopped; 2 tbsp fresh rosemary leaves, chopped (see note); 1 tbsp fresh thyme leaves (see note); 4 garlic cloves, crushed; 3 cups milk; 2 cups beef stock; 750g spaghetti; Shaved parmesan, to serve