Add flour and salt to a large mixing bowl - mix to combine.
Add all of the chilled butter in pieces and all of the chilled shortening to the flour. Using your hands, slowly incorporated them into the flour, breaking them up as you go. When you're done, you will have small, pea-sized shortening and butter within the dough.
Once the butter and shortening have been added, slowly pour in the water. You can start with at least half of the water (be careful not to add the ice, just the water), and slowly incorporate the rest as you mix it in with your hands. The dough should come together and be moist, without being too dry or too sticky. Add more water if it's too dry - it's much easier to add more water than more of the other ingredients, so just add it slowly until you reach the desired consistency.
Split the dough into two, flattened discs, wrap in plastic. and let chill for at least 2 hours. See notes above if you want to freeze.
When you're ready to use the dough, take out ONE disc of dough. Lightly flour a clean, dry, flat surface, and roll it out to about 1/4" thick, in a rough circle. The circle should be slightly bigger than your pie pan. Here's a link to some great ones on Amazon - not a sponsored post, but they're just easy to use - Glass Pie Pans
Once you have the dough rolled out, you need to transfer it to the pie pan - this can be the tricky part for people. My trick, is to lightly roll the dough onto the rolling pin, and then lightly unroll it into the pan, starting from one side - just be gentle not to crack the dough. Worst case, you just need to roll it out again. If it starts to get too warm, you may need to chill it slightly again - but I think you'll finish it before then!
Now, before you remove the other disc of dough, make the filling (see below!). I will finish the dough instructions below with the filling :)