This recipe is extremely simple. Place the 2 flours and butter into a bowl and rum together until the mixture resembles breadcrumbs. Stir in the sugar, lemon zest and vanilla essence. Add in 2 tablespoons of water and mix with a spoon so that the mixture begins to stick together. Place 4 greased metal rings onto a lined baking tray and fill 1/3 full with the crumble mixture. Press down well with the back of a spoon. Next, pile on the fresh berries until almost full. Sprinkle over the remaining crumble mixture, followed by some flaked almonds. Bake in the oven for 20-25 minutes, or until the crumble topping is golden brown. Remove from the oven and allow to cool down for 15 minutes. When ready to serve, remove the metal rings off the crumbles and carefully transfer to your serving plates. Dust lightly with icing sugar and serve with scoop of vanilla ice-cream on top and extra berries on the side.