Let the oat flakes with coconut milk and milk simmer for approx. 8-10 times until the mixture is nice and creamy.
Wash the berries and mash the banana. Stir the banana and 1 tablespoon of berries into the slightly cooled mixture and sweeten as required. If you want, you can also stir in 1 tablespoon of coconut flakes. Serve with the remaining berries and coconut chips.