Use freshly made puff pastry or thaw sheet according to box directions.

Preheat oven to 400°F.

Line a large baking sheet with parchment paper.

Generously flour a cutting board and unroll pastry. Roll into approximately a 12x8-inch rectangle about ⅛-inch thick.

Cut into 8 equal sized rectangles.

In a mixing bowl, add berries, granulated sugar, lemon zest, and cornstarch, mixing gently.

Add a heaping spoon of blackberry mix to the one end of each pastry dough slice.

Gently fold over each pastry dough to the other side, and with a fork, press down until the dough is “sealed.”

Carefully lift each pie and transfer to the baking sheet.

Beat egg and water with fork and with a basting brush, brush each pie well.

Mix brown sugar with the lemon juice and sprinkle on each pie. Dust each with a dash of cinnamon.

Bake in oven for 10-12 minutes until golden brown.

Cool before eating as the filling will be very hot!