In a large bowl, whisk together the flour and salt. Add the cold butter cubes and use a pastry blender or your fingers to cut the butter into the flour until the mixture resembles coarse crumbs.
Gradually add the ice water, one tablespoon at a time, mixing until the dough just comes together. Be careful not to overmix.
Form the dough into a disk, wrap it in plastic wrap, and refrigerate for at least 30 minutes. This allows the gluten to relax and prevents a tough crust.
While the dough is chilling, prepare the pears. Peel, core, and thinly slice them.
In a medium bowl, gently toss the sliced pears with the granulated sugar, cinnamon, ginger, and nutmeg.
On a lightly floured surface, roll the chilled dough into a 12-inch circle.
Carefully transfer the dough to a baking sheet lined with parchment paper.
Arrange the spiced pear slices in a circular pattern on the dough, leaving a 2-inch border.
Dot the pears with the small pieces of butter.
Gently fold the edges of the dough over the pears, pleating as you go.
Brush the exposed dough with the beaten egg. This will give it a golden-brown color.
Sprinkle the crust with turbinado sugar, if desired.
Bake in a preheated oven at 375°F (190°C) for 35-40 minutes, or until the crust is golden brown and the pears are tender.
Remove the galette from the oven and drizzle with honey.
Let the spiced pear galette with honey cool slightly before serving.