In a large bowl combine your flour and salt. Cut in your diced up/cold butter and vegetable shortening until your butter is the size of oats.
Add your egg, vinegar and just enough cold water until the dough combines.
Knead your dough until just combined.
Let your dough rest in the fridge for at least 4 hours.
Roll out your dough and place it in your pie pan. Using a fork, poke some holes in the bottom of your crust. Brush your edge with an egg wash.
Using parchment paper and pie weights bake your crust for 10 minutes at 350 degrees. Then take out your weights and paper and bake for another 10 minutes.
Let crust cool. For more details and pie crust designs check out my pie crust recipe.