Line a loaf pan with parchment paper and pre-heat your oven to 350F
Add the bananas, almond milk, maple syrup, almond butter, vanilla, oats, cinnamon, baking powder, baking soda, salt and coconut oil to the food processor and blend until mostly smooth. A little chunky is ok but you don't over blend or the batter might get gummy.
Add the batter into the prepared baking pan using a spatula and stir in the remaining oats and walnuts, mix well. Top with more nuts if desired.
Bake for 25-30 minutes, turning half way through. Check that a fork or tooth pick comes out clean. Let cool completely before slicing into and store in an air-tight container in the fridge up to a week.