To make the crust, dump the shortening, flour, salt, and sugar into a large bowl and work it together with a pastry cutter until you have coarse crumbs.
Pour in the egg, water, and vinegar and stir until just combined.
Separate into 2 balls of dough and place in ziploc bags. Flatten into round discs. Refrigerate for 30 minutes.
To make the filling, bring a pot of water to a boil and add the peaches, one at a time, to the boiling water for 10 seconds. Remove to a bowl filled with icy water for 10 seconds. The skin should easily peel right off the peaches.
Thinly slice the peaches and place in a large bowl. Toss with the bourbon. Gently stir in the brown sugar, corn starch, ginger, and cinnamon and stir to coat the peaches.
Remove one ball of dough from the fridge and roll it out on a floured surface into a 10 inch circle. Carefully transfer to a 9 inch pie plate.
Add the filling to the pie plate.
Roll out the second ball of dough to a 10 inch circle and carefully place it over the pie filling. Tuck the edges under, trimming any excess as needed, crimp with a fork or your fingers, and cut 4 slits in the center to vent.
In a small bowl, combine the egg and water and brush it over the top pie crust. Sprinkle liberally with sugar.
Bake the pie on a cookie sheet in a 400 degree oven for 10 minutes. Reduce heat to 350 and continue baking for 40 minutes or until golden brown and the filling is bubbling.