Step 1

Make the crust: Pulse flour, hazelnuts, granulated sugar, and 1 teaspoon salt in a food processor until just combined. Add butter, and pulse until mixture resembles coarse meal. With machine running, slowly add 1/4 cup water and process until mixture just begins to hold together. If dough is too dry, add more water, 1 tablespoon at a time, and pulse.

Step 2

Shape dough into 2 disks, and wrap in plastic wrap. Refrigerate 1 disk until firm, about 1 hour. (Freeze remaining disk for another use.)

Step 3

Preheat oven to 375 degrees. Roll out dough to a 1/8-inch-thick rectangle on a lightly floured surface. Transfer to a piece of parchment. Cut dough into 2-by-3-inch pieces. Freeze until firm, about 30 minutes.

Step 4

Meanwhile, make the filling: Combine pears, granulated sugar, figs, lemon juice, flour, cinnamon, and nutmeg in a large bowl. Transfer filling to an 8-by-11-inch baking dish.

Step 5

Arrange dough pieces in a patchwork design, overlapping slightly and leaving holes in between as steam vents. Brush with egg wash, and sprinkle with sanding sugar. Bake until top is golden brown and filling is bubbling in the center, about 55 minutes. Let cool for 15 minutes before serving.