In a saucepan add dates, honey and water. Bring to a rolling boil and let it simmer for 15 minutes. Add 1/2 cup oats to this. Set aside for another 15 minutes.
Measure out the whole wheat flour, cinnamon, salt and baking soda. Keep aside
In a bowl whisk together the egg and butter. Add the date and oat mix to it. And whisk well.
Add in all the dry ingredients and stir until just combined. Do NOT over mix. Add in the water.
Pour the cake into a prepared tin. Add the remaining oats on top of this mixture. Bake for 30-40 minutes or until a skewer comes out clean.