Preheat the oven to 400℉/200℃ and line a large baking tray.
Place one sheet of the puff pastry directly onto the lined baking tray. Place a plate/bowl upside down in the middle and cut around it to create a circle of pastry. Repeat with the other sheet of pastry.
On one pastry sheet, brush over the cranberry sauce
Slice the brie into small pieces and place evenly all over the sauce on top of the pastry. Cover the entire thing with the other circle of pastry. Press gently to seal the edges together.
Use a ramekin to create a small circle in the middle of the pastry and press gently to create an indent. Cut away from the edge of this circle to create ‘strands’ of pastry. The best way to do this is to cut where the numbers on a clock sit, then cut in between each of these so you have 24 total strands.
Take two strands and twist inwards together a few times. Pinch the ends together to seal. Repeat with pairs of strands until all twisted up into a star shape. Brush over the egg wash.
Bake for 15-20 minutes, until totally golden brown. This dish is best enjoyed warm.