Combine the flour, salt and sugar in a stand mixer, and mix till just combined. Add in the cold butter and mix on low medium until dough has crumbs to ½" pieces in it. Add in the 7 tablespoon ice water and continue to mix. Test the mixture by seeing if a small amount holds together; if it doesn't add in another 1-2 tablespoon of water until mix holds together and is still crumby - you don't want to mix it until it becomes a fully combined ball of dough, you want some crumbliness to the dough.
Once your dough is mixed well, take it out and half it. Place each ball of dough between 2 sheets of plastic wrap and roll it into a flat disc about ¼" thick. Refrigerate for an hour.
Make the filling:
Roughly chop up chocolate and place in a small bowl. Warm heavy cream over stove until it simmers then immediately remove from heat. Pour cream over chocolate and stir until nice and smooth - don't worry, it will look a little sketchy at first but will mix together nicely after a minute or so.
Assemble Hand Pies:
Let chocolate filling cool and thicken up a bit.
Once dough has been chilled, remove from the fridge and plastic wrap, and cut one of the discs into 3" x 4" rectangles (or circles in your desired size). Cut the other disc into thin strips that are manageable to work with, about ⅛" -¼" thick.
Crimp edges of rectangle hand pies and generously spread 2-3 tablespoon of filling in hand pie. Apply strips in a criss-cross, haphazard method and crimp strips together with edges of the base so it holds together. Brush gently with egg wash. Bake for approximately 25 minutes or until dough is a light golden brown.
To assemble round hand pies:
Collect any leftover strips of dough, roll out and chill again till you can handle the dough, about 20 minutes.
Remove from fridge and roll out to ¼" thick. Cut out round shapes, fill and cover with an additional round crust, and crimp the edges all the way round with a fork. Depending on what design you want, make sure to cut out a shape before applying top crust, or if you just want plain hand pies, put crust into place and then cut 2-3 slits into crust to allow for venting. Bake for 20-25 minutes.
As soon as hand pies come out of oven, apply edible googly eyes and allow to cool before enjoying!