First, put water and oat milk in a pot and bring to a boil.
Meanwhile, mash half a banana on a plate with a fork.
Add oats and mashed banana. Stir well until the oatmeal binds.
Pour the porridge into a bowl. Coarsely chop the dark chocolate and heat briefly in the microwave.
Then pour it over the porridge. Now place everything - preferably overnight or for at least four hours - covered in the refrigerator.
When the chocolate coating is firm, the porridge can be taken out of the refrigerator. I topped it with the other half of the banana, a few cocoa nibs and peanut butter!