Mash the banana thoroughly.
Mix the oatmeal, baking powder, and salt together.
Add eggs, milk, and olive oil to the mashed banana, stir well, then combine with the oatmeal mixture.
Add chocolate chips and mix evenly.
Pour the batter into a pound cake mold.
Bake in a preheated oven at 180°C for 30-35 minutes.
Remove from the mold and let cool to finish.