2 carrots, chopped
160g/5戮oz whole button mushrooms
1 onions, chopped
2 sprigs thyme, leaves picked
1 beef stock cube, dissolved in 400ml/14fl oz water
salt and pepper
1 tbsp cornflour
2 tbsp vegetable oil
1 free-range egg yolk, beaten
100驳/3陆辞锄 puff pastry, rolled to 5mm thick
500g/1lb 2oz beef stewing steak