Ok well bear with me because I don't have a recipe as I did just make it up but I have done it loads of times and it does work.
You can do it two ways; for lots of people a whole roast works well but for individuals you can use quorn fillets and make individual parcels iyswim.
Ingredients
Quorn - must be defrosted.
Pastry - puff works best but short works too, make it if you want.
Stuffing - I make a fruity one with dried apricots, onions, breadcrumbs, eggs and loads of herbs. You can use whatever stuffing you want but it needs to be moist.
Egg wash- a mixture of eggs and milk.
Method
If it is a whole roast, take it out of the plastic wrapp, cut a small slice off it lenghtways( to help it sit) and split it lenghtways down the centre.
Roll out your rectangular piece of pastry vertically in front of you. Place the base of the quorn (ie the bit with the flat end) in the centre of the top of the pastry.
Pile the stuffing on top of the quorn and compact it down a bit. Put the other piece of quorn on top of the stuffing.
Brush the edges of the pastry with the egg mix and fold the pastry over to cover the quorn.
Press the pastry together and press the edges with a fork to form a seal. Cut off the excess pastry. Cut one or two small slits on the top of the parcel and brush it all over with the rest of the egg wash.
Cook it at about 180C for about 45/60 minutes.