Pre-heat the oven to 400ºF and line a baking sheet with parchment paper.
Roll the pastry out to around 5mm thick and cut a large circle out of the pastry.
Lay the pastry on the prepared baking sheet.
Mark a circle with a medium-sized bowl and with a sharp knife, cut 4 cuts into the center circle.
Spread the cranberry sauce around the center “star” then top with the cheese and pistachios.
Bring one point of the center star over the filling as well as bringing the outer edge of pastry inwards. Press the two together and continue until you have a wreath.
Brush with beaten egg then place in the oven and allow to bake for 15 minutes until golden brown and cooked through.
Remove from the oven, allow to rest for 5 minutes then slice and serve.
