Begin by preheating your oven to 400°F (200°C) and line a baking sheet with parchment paper to prevent sticking.
On a lightly floured surface, carefully unfold the thawed puff pastry. Use a rolling pin to gently roll it out, smoothing out any creases or folds for an even texture.
Using a sharp knife or pizza cutter, slice the puff pastry into squares measuring approximately 3 inches on each side. You should aim for about 12 squares.
Take each pastry square and place a cube of brie cheese in the center. Ensure the cheese is generous enough for a delicious melty filling.
Using a small spoon, add about 1 teaspoon of cranberry sauce over the brie cheese in each square, allowing it to nestle perfectly with the cheese.
For a burst of aromatic flavor, sprinkle a pinch of finely chopped rosemary on top of the cranberry sauce.
To create the bite-sized pockets, fold each corner of the pastry square towards the center, pinching the seams together firmly to seal in the cheesy goodness.
With a pastry brush, apply a coat of the beaten egg on top of each puff pastry bite to give them a golden finish while baking.
For an extra touch of flavor, lightly sprinkle sea salt over the egg-washed tops.
Place the assembled pastry bites on the prepared baking sheet, spacing them a couple of inches apart to allow for puffing.
Bake in the preheated oven for 15-20 minutes, observing closely until the pastries are puffed up and golden brown.
Once baked, remove the bites from the oven and transfer them to a wire rack to cool slightly.
For an appealing presentation, garnish with chopped fresh parsley before serving, giving each bite a fresh pop of color.
Notes
Serve on a rustic wooden platter with extra cranberry sauce for dipping.