1 garlic clove, crushed
1 onion, halved and cut into 12 wedges
1 tbsp chopped fresh thyme, or 陆 tsp dried thyme
陆 tsp English mustard powder
1 bay leaf
500ml/18fl oz beef stock made with 1 beef stock cube, or 500ml/18fl oz fresh beef stock
salt and freshly ground black pepper
1 tsp cornflour
3 tbsp sunflower oil
1 tbsp tomato pur茅e
4 braising steaks (about 200g/7oz each)