Panforte

Name: Panforte
Ingredients: Nonstick cooking spray, for pan; 3 cups whole blanched almonds; 1 3/4 cups whole hazelnuts, skinned or unskinned; 2 cups diced candied orange peel; 6 ounces dried apricots, diced; 5 ounces dried figs, diced; 1 cup unbleached all-purpose flour; 2 tablespoons ground cinnamon; 1 tablespoon Dutch-processed cocoa powder; 1 teaspoon coarse salt; 1 teaspoon ground nutmeg; 1/2 teaspoon ground cloves; 1/4 teaspoon freshly ground black pepper; 1 3/4 cups granulated sugar; 1 3/4 cups honey; 6 tablespoons (3/4 stick) unsalted butter, plus more for pan; Confectioners' sugar, for dusting