Using a loose based round cake tin, cover the base in cling film, and fit to the tin. Cover the sides in silver foil.

Add the almonds, pecans (reserve 8 for decoration), dates, an inch of the vanilla, a sprinkling of nutmeg, the carob powder and the juice of the orange to a food processor. Process gently to start with, and continue until you get a dough-like consistency, but still chunky. If it's not doughy enough add small quantities of water until you achieve the desired result. Place in the cake tin, and flatten down.

Clean your food processor and add the chopped frozen banana. Halve the kumquats and remove the middles, add the skins to the processor. Slit the vanilla pod and scrape the seeds into the processor. Slice the cheeks off the mango, and skin them, add those to the food processor. Add most of the rest of the nutmeg. Add a couple of chopped dates if you like, too. Process for several minutes, until the whole mixture turns to white fluff. Don't be tempted to process this for less time, but do stop for a minute if your machine gets hot. It needs to go white and fluffly. Scrape it down every now and then so everything gets processed. Add this to the cake tin, on top of the nut base. Smooth it all down so there's no trapped air, and is level on top. Add the left over pecans in a nice pattern and sprinkle the rest of the nutmeg.

Return it all to the freezer for at least an hour. Once ready to serve, turn out the cake by pushing the loose base out and up. Take the foil off and place on a serving plate.