Preheat oven to 450°.
Beat the egg and set it aside.
Dust the counter with a bit of flour or line it with parchment paper. Also, dust a rolling pin with a bit of flour.
Roll out the pie crust and roll it 2-3 times horizontally and vertically with a rolling pin.
Cut out an equal number of pie crust shapes.
Transfer ½ of the crusts to a parchment paper-lined baking sheet.
Add 1-2 teaspoons (depending upon the size of the cutout) of jam to the center of each pastry.
If using fresh fruit, add 1-2 slices on top of the jam.
Brush the edges of the pastry with the beaten egg.
Top with another pasty cutout to create a small pie.
Crimp the edges with a small fork to seal the pastries.
Brush the entire pastry with the beaten egg.
Bake for 10-12 minutes, until golden brown.
Cool on a baking rack.