# How To Make It:
01 - Whisk together flour, salt, and sugar in a large bowl. Cut in cold butter using a pastry blender or fingertips until mixture resembles coarse crumbs. Gradually add ice water, stirring just until dough comes together. Divide dough in half, shape into disks, wrap in plastic, and refrigerate for at least 1 hour.
02 - Peel, core, and slice apples 1/4-inch thick. In a large bowl, toss apples with both sugars, cinnamon, nutmeg, salt, flour, and lemon juice. Set aside.
03 - Preheat oven to 400°F. On a lightly floured surface, roll out one dough disk to fit a 9-inch pie dish. Gently fit crust into pie dish. Fill with apple mixture, mounding slightly in the center. Dot with butter pieces. Roll out second dough disk and place over filling. Trim excess dough, seal and crimp edges. Cut a few slits in the top for steam to escape.
04 - Whisk egg and milk. Brush over top crust. Sprinkle with coarse sugar if desired. Bake pie on lower rack for 45–55 minutes, until crust is golden and filling is bubbling. If edges brown too quickly, cover with foil.
05 - Let pie cool on a wire rack for at least 2 hours before slicing. Serve warm or at room temperature, optionally with vanilla ice cream.