In a pot mix berries, lemon juice and sugar and let simmer 5-10min
Make a cornstarch slurry with cornstarch and water and mix in
Let cool completely
Preheat oven 400
Roll out puff pastry
Add 1TBS of berries and brush edges with egg wash
Fold other half over and seal with fork
Freeze 10 mins
Brush with egg wash and bake for 18min or until golden brown
