Grind the oats finely and set aside.
Mash the bananas and mix with the oats.
Add peanut butter, eggs, honey (or sugar), baking powder, and milk, then mix well.
Pour the batter into a pan (or mold) lightly greased with oil.
Bake at 180°C (356°F) for 25 to 30 minutes.
Let it cool before eating.