Preheat the oven to 350°F / 180°C.
In a bowl, mash the Chiquita bananas with a fork. Mix the maple syrup and oat milk with the Chiquita bananas until well combined.
Mix the dry ingredients (oatmeal, wheat flour, baking powder, cinnamon, chopped walnuts and salt) together.
Whisk the dry ingredients to the Chiquita banana mixture until just incorporated. Pour the batter into a lined cake tin. Top the remaining chopped walnuts and bake for approx. 30 minutes.
You can eat this dish with (non-dairy) yoghurt and red fruits.