01 - Preheat oven to 375°F. Lightly grease a 9-inch tart pan with removable bottom.
02 - Combine flour, sugar, and salt. Rub in cold butter until mixture resembles coarse crumbs. Add egg yolk and 2 tablespoons cold water; mix to form dough, adding more water if necessary. Shape into a disk, wrap, and chill 20 minutes.
03 - Roll dough on floured surface to fit tart pan. Press into pan, trim excess, and prick base with fork. Chill 10 minutes.
04 - Line crust with parchment, fill with pie weights or dried beans. Bake 12 minutes, remove weights and parchment, bake 5 more minutes until lightly golden.
05 - Toss pear slices with brown sugar, spices, lemon zest, lemon juice, and cornstarch until coated evenly.
06 - Arrange pears concentric on baked crust. Drizzle melted butter and sprinkle sliced almonds if desired.
07 - Bake 20 to 25 minutes until pears are tender and edges golden.
08 - Cool slightly, dust with powdered sugar if desired, slice, and serve.