Preheat oven to 355 °.
Prepare 9x5 bread pan. Cover with parchment paper and lightly coat with butter or baking spray. Dust with flour. Set aside.
In a bowl combine flour, cinnamon, cardamom, baking soda, baking powder and salt. Set aside.
In a medium bowl mix together sugar and eggs until well combined.
In a large bowl mash the bananas with a fork. Grate the zucchini and add to the bowl. (No need to press out the water from the zucchini. You want that for a super moist bread)Add sugar and eggs. Stir to combine. Add coconut oil and vanilla. Give it one more stir to combine all the ingredients. Gradually add the flour mixture while stirring and mix together to combine. Don't over mix. It's ok if there are a few lumps.
Pour batter into prepared loaf pan. Bake 40-50 minutes until top is brown and slightly splitting. It should spring back when touched. Or do the toothpick thing and see if it comes out clean.
Let bread cool before slicing. This quick bread will keep in the refrigerator for about 4 days. It freezes easily and will keep frozen for up to 4 months.