STEP 1:Put the blueberries in a saucepan over medium-low heat and cook for 3–4 minutes, until they begin to soften and burst. Add the banana and mash it into the blueberries with a fork.
STEP 2: Add the milk and oats and cook gently over a medium-low heat for 10 minutes, stirring often. Finish with a pinch of salt stirred through. Add more milk to thin the porridge, if you like.
STEP 3: Serve topped with raspberries and strawberries.