In a medium bowl, mix together all pastry ingredients until dough forms
Chill dough for at least 15min
While dough is chilling, mix together all filling ingredients in a saucepan on the stovetop. Mashing the cherries to squeeze out as much juice as possible.
Once dough is chilled, split into two halves and roll out each half into a VERY thin rectangle - about ⅛in thick on parchment paper
Take one rectangle and place it on a cookie sheet
Top with all of the filling and spread it out evenly
Take the other rectangle and flip it over on top of filling and first rectangle
Press down outer edges to seal the pastry and poke holes in the top to allow steam to escape during baking process
Bake at 350℉ for 17-20min or until golden brown across entire pastry
While baking, mix together all Icing ingredients in bowl and spread over slightly cooled pastry - spreading evenly over entire pastry. Top with sprinkle if desired
Slice large pastry into 12 even pieces. Enjoy!