Add the rolled oats, the eggs, the bananas and baking powder in a deep bowl and use the immersion blender to mix everything until smooth.
Set the composition aside for 10 minutes.
Heat up a grill pan and roast the peaches (in halves) face-down for 5 minutes on medium heat. Turn the halves and cook for 5 minutes more on their 'backs'.
Use a shallow frying pan (a crepes pan if you have one) to cook the pancakes. Preheat it on medium heat.
Add pancakes batter with a small ladle to the frying pan. Add 5-6 blueberries on the batter surface.
Cook 2 minutes on a side (or until bubbles start to form and leave holes in the pancake) and another minute on the other side.
Leave to rest for a couple of minutes before serving, then garnish the pancakes with remaining fresh blueberries, maple syrup drizzles, peaches halves and a few leaves of mint (optional).