Preheat the oven to 375 degrees.
Soak the raisins in hot water until soft, about ten minutes.
Remove the needles from the sprig of rosemary and soak them in water. This will keep them from burning when you put the cake in the oven.
Chop the shelled walnuts.
Lightly toast the pine nuts, about 5-7 minutes in the oven or until fragrant.
Sift the chestnut flour and salt in a bowl.
Slowly add the warm water and wine, whisking constantly until well combined.
Strain the raisins and add to the mixture. Add the orange zest, fennel, half of the raisins, half of the walnuts and half of the pine nuts to the mixture. Stir until well combined.
Cover a 12 inch diameter hinged mold with parchment paper and lightly grease with olive oil.
Pour the mixture into the mold.
Sprinkle the surface with the leftover raisins, and the remaining walnuts and pine nuts. Finish everything off with a drizzle of oil and the needles of the rosemary sprig.
Bake for 35-40 minutes, until the cake pulls away from the pan and small cracks form on the edges.
Allow the cake to cool before removing it from the mold. Serve it with a drizzle of honey and a scoop of fresh ricotta cheese or mascarpone whipped cream.
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