For the Chocolate Banana Porridge, place the rolled oats in a small saucepan with the water and bring to a boil. Stir in the cocoa powder and sugar.
Then turn down to low flame and simmer for about 15 minutes, stirring occasionally with the wooden handle of a wooden spoon.
Meanwhile, chop the banana into small pieces and mix into the porridge at the end. Serve the chocolate banana porridge.