Combine flour, salt, and cold butter in a large bowl using a pastry cutter until the mixture resembles coarse meal.
Add ice water one tablespoon at a time until the dough holds together when pressed.
Divide dough into two portions, shape into disks, and chill for 1 hour.
Peel, core, and thinly slice apples into uniform pieces.
Toss apples with sugar, cinnamon, and lemon juice in a large bowl.
Roll out each dough portion into a large rectangle on a floured surface.
Place one dough rectangle into a large baking sheet.
Spread the apple mixture evenly over the bottom crust.
Cover with the second dough rectangle and crimp the edges to seal.
Cut slits in the top for ventilation.
Bake at 375°F for 45 minutes until the crust is golden brown and the filling is bubbling.