Meanwhile, cut the apple quarters into 1/4-inch thick slices. Toss the apples with the sugar, lemon juice, lemon zest, nutmeg, and salt. Whisk together the egg yolk and water to make an egg wash. Brush the inside edge of the pastry with the egg wash. Arrange the apples in the pie shell and dab the top with pieces of cold butter. Slide the lattice top over the apples. Press the pastry of the lattice firmly on the crimped edge to seal the 2 together. Brush the lattice with egg wash. Place the pie on a baking sheet and bake for 1 hour and 15 minutes.