01 - Whisk flour, sugar, and salt in a large bowl. Add cubed butter and cut in using a pastry cutter or fingertips until mixture resembles coarse crumbs with pea-sized butter pieces remaining. Gradually drizzle in ice water while stirring just until dough holds together when pinched.
02 - Divide dough in half and shape each portion into a flat disk. Wrap tightly in plastic wrap and refrigerate for at least 1 hour or up to 2 days. This resting period allows gluten to relax for easier rolling.
03 - Combine pitted cherries, sugar, cornstarch, lemon juice, almond extract, and salt in a large bowl. Gently fold together until cherries are evenly coated and cornstarch has dissolved. Let stand for 15 minutes to release juices.
04 - Position oven rack to center and preheat to 400°F. On a lightly floured surface, roll one dough disk into a 12-inch circle. Carefully transfer to a 9-inch pie dish, pressing gently into the bottom and sides. Trim edges to hang 1 inch over the rim.
05 - Pour cherry filling into the prepared bottom crust, mounding slightly in the center. Dot with additional butter pieces if desired for extra richness.
06 - Roll remaining dough disk into an 11-inch circle. Cut into 1-inch wide strips. Lay half the strips parallel across the pie, spacing evenly. Weave remaining strips perpendicular through the first strips, alternating over and under to create a lattice pattern.
07 - Trim lattice strips flush with bottom crust. Fold bottom crust overhang over lattice strips and crimp edges with fingers or fork to seal. Use a small heart-shaped cutter to cut decorative shapes from dough scraps and press onto lattice if desired.
08 - Brush entire lattice top and crimped edges lightly with beaten egg using a pastry brush. Sprinkle coarse sugar evenly over the surface for a sparkling, crunchy finish.
09 - Place pie on a foil-lined baking sheet to catch drips. Bake at 400°F for 20 minutes until crust begins to set and turn light golden.
10 - Reduce oven temperature to 350°F without opening door. Continue baking for 30-35 minutes until lattice is deep golden brown and filling bubbles thickly through the vents. Shield edges with foil if browning too quickly.
11 - Transfer pie to a wire rack and cool completely for at least 3 hours. This essential step allows the filling to set properly for clean slices. Serve at room temperature or slightly warmed.