For the sausage and mushroom ragù:
3 tablespoons olive oil
2 medium carrots, trimmed, peeled and finely chopped
1 onion, trimmed, peeled and finely chopped
2 sticks of celery, trimmed and finely chopped
400 g good-quality Italian sausages
300 g mushrooms of your choice, trimmed and roughly chopped
8 cloves of garlic, peeled and finely chopped
10g thyme, leaves stripped off stems
15g rosemary, leaves stripped off stems and finely chopped
3 bay leaves
Sea salt
Black pepper
2 tablespoons tomato puree
2 tins of chopped tomatoes
100ml red wine or stock
For the Grana Padano polenta:
200 g polenta
1 litre water
Sea salt
65 g butter, cubed
100 g Grana Padano, finely grated
Black pepper