Mix ground flax seeds with 6 tbsp of water and let sit for 10 minutes.
Preheat oven to 180°C/350°F and grease a Bundt cake pan with vegan butter or oil.
Mix all flours, almonds, spices and all other dry ingredients in a large mixing bowl.
Cut persimmons in cubes and process in a blender until juicy.
Mix into the dry ingredients along with orange peel and juice, flax seed mixture and vegan butter. Mix well until well incorporated.
Fill the batter into the prepared Bundt pan and bake on the lower rack for 45-50 minutes. Take out the oven and let cool completely on a wire rack.
Prepare the white chocolate glaze. Over a double boiler on barely simmering water, melt the cocoa butter. Stir in all other ingredients and mix until smooth. Let cool until room temperature. Pour over the cake and sprinkle with candied orange peel.