Soak the oats in milk for 10 minutes.
Mash and mix the egg and banana together.
Add blueberries and baking powder to the oat, egg, and banana mixture and mix well.
Lightly coat a pan with a little oil and place the batter on, then cook over low heat.
Once one side is cooked, flip and cook the other side.
Top the finished cake with the remaining blueberries before serving.