Mash 2 1/2 bananas in a mixing bowl. Save the other 1/2 banana to be used as slices on top of the loaf.
Add in the oil, vanilla extract, almond milk, and brown sugar to the bowl and mix well.
Next add the flour, baking soda, and salt. Mix until the batter no longer has lumps.
Lastly, add the cinnamon and chopped nuts. Fold this into the batter gently making sure not to over mix.
Place the batter into a greased or parchment lined loaf pan. Top with the remaining slices of banana.
Cook for 50-60 minutes in an oven that's been preheated to 350°F. You want the top of the bread to be a golden brown.
Once done cooking, remove the loaf pan from the oven and let it sit for 10 minutes. Afterwards, remove the loaf from the pan and let it cool on a cutting board or cooling rack.
Once cooled, cut and enjoy.