Soak the oatmeal in milk.
Wash the blueberries thoroughly.
In a bowl, mix the soaked oatmeal, blueberries, eggs, honey, and baking powder.
Pour the batter into a cake mold.
Bake at 180°C (356°F) for 25-30 minutes in a preheated oven.
Once completely cooled, cut into bite-sized pieces.