After fooling around in the kitchen for a while, I spread a thin coat of melted chocolate, paper thin, on a sheet of wax paper, smoothed
a second sheet of wax paper over the chocolate, then rolled the whole thing up into a tight roll and slipped it into the fridge.
Once your dough holds together and is no longer sticky, but becomes pliable, sprinkle with a bit more potato starch and cover it with
a second sheet of waxed paper and using either your hands or a rolling pin, press it into an even 10 - inch circle.