Firstly, roll out the sheet of puff pastry to thin it out a little then cut in half.
Take one half, lay onto a parchment lined baking sheet and prick with a fork all over.
Bake in a 180C oven for 10-15 mins until just starting to brown.
Meanwhile, shred the sprouts as finely as you can and mix the sour cream with dijon mustard in a little bowl.
Prep all other ingredients for the pie - shred the turkey or chicken, grate the cheese and whisk the egg you’re going to use to egg-wash the pastry later.
Take the par-cooked pastry base and use the back of a spoon to flatten it down.
Start layering up your fillings - cheese, sprouts, turkey, ham, sour cream mixture, cranberry sauce and more cheese.
Egg wash the edges of the cooked pastry base at this point, then drape the other raw pastry half on top and seal around the edges with a fork.
Egg wash the whole thing then use the back of a cutlery knife to make some decorations - feel free to be as creative as you like!
Put the whole thing back in the oven for 20-25 minutes until deeply golden.
Let it cool slightly before slicing up and serving straight away!
