Preheat oven to 325º
grease 9x5 loaf pan and set it aside
Shred zucchini and set aside
Combine flour, cinnamon, baking soda, baking powder and salt. Stir well, and set aside
Whisk oil, and sugar together, then add eggs and vanilla and whisk until combined
Beat in bananas. If you’re using an electric mixer, that will do the job of mashing the banana. Otherwise, you may want to mash your banana with a fork or potato masher before adding
Stir in flour mixture until just mixed
Add zucchini and stir together until fully distributed
Pour batter into a greased 5x9 inch loaf pan
Bake in center of oven for 60-65 minutes, until a toothpick inserted into the center comes out clean
Remove from oven and let rest for 10 minutes, then loosen edges of loaf from pan with a butter knife, and carefully remove from pan to cool on a wire rack.