Preheat oven to 400F(205C).  Line the baking sheet with parchment paper.

• Mix together softened cream cheese with sugar, add vanilla extract, egg and lemon zest.
• A pack of 1 lb. puff pastry usually comes in two sheets.  Carefully separate them, take one and stretch it a little using a rolling pin. Cut each in half so you have 4 squares.
• Place one of them on a lightly floured surface and stretch little bit using your hands or a rolling pin.  Spread 1/4 of filling over it and then add 1/4 of blueberries.
• Cut slits apart from 2 sides of pastry. Starting at one end fold pastry strips over on a diagonal, alternating sides.
• Repeat with remaining pastry squares.
• Brush with egg wash.
• Bake for 25 – 30 minutes.
• For additional sweetness you can sprinkle strudels with powder sugar.