3 medium carrots, peeled and thickly sliced
2 celery sticks, trimmed and thinly sliced
2 medium leeks, trimmed and cut into 2cm/1in slices
2 medium onions, chopped
fresh parsley, chopped, to garnish
splash Worcestershire sauce
1 bay leaf
陆 beef stock cube
freshly ground black pepper
2 tbsp light muscovado sugar
1 tbsp cornflour
1 tsp flaked sea salt, plus extra to season
1 tbsp sunflower oil
2 tbsp tomato pur茅e
12 good-quality pork sausages
500ml/18fl oz India pale ale