In a medium bowl, combine the flour, almonds, walnuts, hazelnuts, salt, figs, candied citrus, cocoa, cinnamon, cloves, pepper, nutmeg and coriander. Stir well.
Prepare a 9-inch round cake pan: Butter the bottom, place a piece of round parchment paper in the bottom, butter again and flour. Set aside.
Preheat oven to 325.
In a thick-bottomed pan over medium heat, place the sugar, molasses, dark chocolate, honey and powdered sugar. Stir with a wooden spoon or heat-resistant spatula until the sugar is dissolved. Allow to continue cooking for 5–10 minutes, until the mixtures begins to thicken just a bit. Remove pan from heat and add to the fruit and spice mixture. Stir using a wooden spoon. The mixture will be very sticky and dense.
Pour the mixture into the prepared pan and spread it out with the wooden spoon. With wet fingers, press the mixture into the pan and level it out.
Place in oven and bake for 30 minutes.
Remove from oven and allow to cool for 10–15 minutes.
Remove from pan and place on a baking rack to cool completely. Dust with the powdered sugar and slice.
Panforte keeps well on the counter for about 5–7 days or stores well in the freezer.