A big shout-out to Michelle for this one!
1 sheet (1/2 of a package) of puff pastry, thaw according to package instructions
1 8 oz round of Brie cheese
1 tbsp. water
Heat the oven to 400 degrees.
Unfold the pastry sheet on a lightly floured surface.
Place the cheese in the middle of the pastry, fold over edges to cover, press together, trim excess.
Beat the egg and water in a small bowl, brush the pastry with the mixture.
Place seam-side down on a baking sheet.
Bake for 25 minutes until the pastry is golden brown. Let stand for 20 minutes before serving.