300²µ/10½´Ç³ú chestnut mushrooms, finely chopped
10g dried porcini
3 shallots, finely chopped
3 thyme sprigs
2 tsp English mustard
plain flour, for dusting
sea salt and freshly ground black pepper
1 tbsp olive oil
1 tbsp butter
1 large free-range egg, beaten
500g/1lb 2oz puff pastry
100ml/3½fl oz single cream
6 thick beef fillet steaks with a good marbling of fat
100ml/3½fl oz brandy