1 preheat oven to 220C

2 using food processor, chop onion and mushrooms separately, as finely as possible

3 melt butter in medium frying pan

4 add onion and mushroom, season and add nutmeg

5 coat well with butter, lower heat and allow mixture to slowly cook uncovered for about 30min

6 stir every few minutes to ensure that the liquid is evaporating

7 remove mixture and place in bowl and refrigerate till completely cooled

8 season steaks and keat the butter in large non-stick frying pan over high heat

9 sear steaks for 1 min on each side

10 add brandy and fry for a further 30sec

11 remove from heat and allow to cool

12 lightly roll the pastry out on floured surface

13 cut into 4 squares

14 lightly brush surface of each pastry with the egg

15 place 3tbsp of mushroom mixture in middle of each pastry and top with steak

16 spoon another 3 tbsp mushroom mixture on top of steak

17 bring 4 pastry corners together to close steak

18 brush with remaining beaten egg and place on baking tray

19 bake for 25min for medium rare