Wash the peaches and strawberries. Remove the green of the strawberries and the core of the peaches. Cut everything into small pieces and put in a blender. Add the oat milk and mix everything briefly. Alternatively, puree well with a hand blender.
If it`s not sweet enough, you can add a little sweetener. Adjust the amount of oat milk to your taste. Some like smoothies rather thin, others rather thick.