Bring the liquid to a boil. Meanwhile, cut the banana and strawberries into small pieces. When the liquid boils, add the oatmeal and stir. Possibly sweeten with honey or agave syrup. Cook for about a minute on the highest setting and stir so that the whole thing does not burn. Add about half of the banana to the pulp and season with a little vanilla.
Then turn the stove down a little and let it simmer until the porridge has the desired consistency. If the porridge cooks too long and becomes sticky, just add a little liquid.
Finally, pour the porridge into a bowl and serve with the remaining banana and strawberries. If necessary, sprinkle a little more vanilla on top.