Prepare: Preheat your oven to 200°C (400°F) and line a baking tray with parchment paper. This ensures even baking and easy cleanup.
Shape the Pastry: Roll out the thawed puff pastry sheets on a lightly floured surface. Cut each sheet into matching triangular shapes—think Christmas trees! Use any extra pastry to create fun decorations, such as stars or ornaments.
Layer the Filling: On one triangle, evenly layer about 60 g of sliced brie, followed by 20 g of dried cranberries and 25 g of chopped pistachios. Drizzle with 1 tbsp of honey for a sweet touch.
Seal: Place a second triangle on top of the first. Press the edges together to seal, using a fork to crimp the edges. Keep the filling intact as you shape it into a Christmas tree.
Brush with Egg: Use the beaten egg to brush the top of the pastry, be sure to cover the entire surface to achieve that lovely golden finish while baking.
Bake: Place your Christmas tree on the prepared baking tray and into the preheated oven. Bake for 15-20 minutes, or until the pastry is puffed and golden brown. To check for doneness, look for a crispy surface and an inviting aroma.
Garnish and Serve: After removing from the oven, let it cool for a few minutes. Optional: Add fresh rosemary sprigs around the base for an aromatic touch and visual appeal. Serve warm.