Preheat oven to 200°C /400°F.
Remove the plastic and paper packaging and place the brie cheese in a plate.
With a knife, cut the brie horizontally into two halves.
Add the toppings onto one side of the brie cheese, and cover with the other half of the brie, like a sandwich.
In a small bowl, whisk together the egg with one tablespoon of water to make an eggwash.
Roll out the puff pastry dough onto a large baking tray.
Place the brie wheel in the middle of the puff pastry dough.
Wrap the puff pastry dough over the dough, folding the corners so that they cover the brie entirely.
Brush the eggwash onto the outside of the puff pastry for a golden brown crust.
Bake in the oven for approximately 35 minutes or until the puff pastry looks nice and golden.
Remove from the oven and serve with crackers or bread.