01 - Preheat oven to 400°F (200°C). Line a baking sheet with parchment paper.
02 - In a mixing bowl, gently combine pear slices with granulated sugar, lemon juice, and ground cinnamon. Set aside to allow flavors to marry.
03 - On a lightly floured surface, roll out the puff pastry sheet to smooth any seams if necessary. Cut into 6 even rectangles.
04 - Arrange several pear slices in the center of each pastry rectangle, maintaining a 1/2-inch border on all sides.
05 - Fold the edges of each rectangle slightly over the pears to create a rim.
06 - Brush the pastry borders lightly with beaten egg to promote a golden, glossy finish.
07 - Place the assembled pastries on the prepared baking sheet, allowing space between each piece.
08 - Bake for 20 to 25 minutes, or until the pastry puffs and turns golden and the pears are tender.
09 - While pastries bake, heat apricot jam and water in a small saucepan over low heat until the mixture is liquid. Strain for a smooth finish if desired.
10 - Upon removing pastries from the oven, brush the warm fruit with apricot glaze. Allow to cool slightly before serving warm or at room temperature.