01 - Preheat oven to 400°F (200°C) and line a baking sheet with parchment paper.
02 - In a mixing bowl, gently toss pear slices with granulated sugar, lemon juice, and cinnamon. Set aside.
03 - On a lightly floured surface, roll out the thawed puff pastry sheet to smooth seams if needed, then cut into 6 even rectangles.
04 - Arrange pear slices in the center of each pastry rectangle, leaving a 1/2-inch border. Fold pastry edges slightly over the pears to create a rim.
05 - Brush the edges of each pastry with beaten egg for a glossy finish.
06 - Place pastries on the prepared baking sheet and bake for 20 to 25 minutes, until puffed and golden with tender pears.
07 - While pastries bake, heat apricot jam and water in a small saucepan until liquefied. Strain if desired for a smoother finish.
08 - Remove pastries from oven. While still warm, brush pears with apricot glaze. Allow to cool slightly before serving; serve warm or at room temperature.