Preheat oven to 180 degrees and line the side of cake tin with non-stick baking parchment.
Peel bananas and chop.
Put a third of the batter into the bread tin and sprinkle over a third of the blueberries.
Repeat this until you have used all the ingredients.
Bake for 40 minutes, or until risen.
Allow to cool, then slice the banana bread, serve and enjoy!