Preheat the oven to 350F.
On a flat surface, use a fork to mash the bananas, it's easier than a cutting board, I promise!
Next use a microplane to finely grate the zucchini, use a paper towel to squeeze out any excess moisture. Add the shredded zucchini in with the banana.
In a large bowl, add the olive oil, brown sugar, eggs and vanilla extract. Whisk to combine, then add in the banana and zucchini and whisk again until the mixture is smooth.
Add in the flour, baking soda, salt and cinnamon. Fold this in with a spatula until the batter is thick and smooth.
Pour this batter into a parchment lined 9"x4" loaf pan.
Bake at 350F for 45-55 minutes or until you can insert a toothpick and it comes out clean.
Let the loaf cool for 15 minutes before slicing, then enjoy!