Soak the oat flakes with the almond milk and some water for at least half an hour.
Mix the egg in a bowl with the cornstarch and, if necessary, sugar / sweetener. Then mash the bananas with a fork and add them to the bowl with the oatmeal. If you want, you can add cinnamon or vanilla sugar.
Pour the mass into a baking dish lined with baking paper and bake at 175 degrees top / bottom heat for approx. 45 minutes until a beautiful golden brown color can be seen and the mass no longer wobbles.
Take out of the oven and let cool down a bit. I like to spread cream cheese or yogurt on the whole thing. Sprinkle with cinnamon.
In terms of consistency, it is like a solid oatmeal, you can eat it easily with a fork.