Preheat your oven to 400°F (200°C).

Roll out the puff pastry on a lightly floured surface.

Cut the pastry into squares about 3 inches in size.

Place a small piece of brie and a spoonful of cranberry sauce in the center of each pastry square.

Fold the pastry over the filling to create a pocket and seal the edges.

Brush the tops with the beaten egg.

Bake for 15-20 minutes until golden brown.

Optionally, sprinkle with fresh thyme before serving.