Mix together all ingredients except pastry, egg and water; set aside.
Unfold thawed pastry on a lightly floured surface. Roll each sheet into a 12"x12" square. Cut six, 6"x6" squares, reserving remaining pastry for another use.
Spoon 1/3 cup chicken mixture onto center of each square. Bring 4 corners of pastry to center; twist slightly and press edges to seal, forming a bundle shape. Arrange bundles on an ungreased baking sheet.
Whisk together egg and water; brush over bundles. Bake at 400 degrees for 15 to 25 minutes, until golden.