2. Beat the butter and sugar until well combined. Add the mashed banana, egg and vanilla then mix well. Sift in the flour and baking powder and combine well.
3. In a small pot place the water, dates and sliced banana and bring to a boil. Remove from the heat and add the baking soda. Pour into the pudding mixture and combine.
4. Spoon the mixture into your greased ramekin. Sprinkle with the extra sugar. Place into the centre of the oven for 20 minutes. The pudding will still be sticky in the middle. Remove from the oven.