Step 1

Preheat oven to 325°F, with racks in upper and lower thirds. In a mixer fitted with the paddle attachment, beat flour, granulated sugar, cornmeal, baking powder, salt, and allspice to combine. Add butter; beat on medium speed until coarse crumbs form, about 2 minutes.

Step 2

Reduce speed to low and add whole eggs, one at a time, beating after each addition, until a stiff dough forms. Beat in pistachios, papaya, and ginger. (If they don't completely incorporate, knead in.)

Step 3

On a parchment‐lined baking sheet, shape dough into two 11‐inch logs. Pat each out to 2 inches wide. Brush with beaten egg white and sprinkle generously with sanding sugar. Bake until set in middle, firm to the touch, and light golden brown, 35 to 45 minutes. Let cool completely on sheet on a wire rack.

Step 4

With a serrated knife, slice logs on the diagonal, slightly wider than 1/4 inch. Arrange slices, cut‐sides down, on parchment‐lined baking sheets. Bake, rotating sheets halfway through, until just golden, 18 to 20 minutes. Let cool on sheets on wire racks. Store in an airtight container at room temperature up to 3 weeks.