Preheat oven to 350 degrees. Line a standard muffin tin with paper liners then set aside.
In large mixing bowl, whisk together flour, salt, baking powder, baking soda and cinnamon. Set aside.
In a separate bowl, whisk oil and eggs with honey and vanilla until well combined.
Add mashed banana to wet ingredients then stir with a spoon until incorporated.
Add dry ingredients to wet then stir with a spoon until just barely combined.
Wrap 2 cups of finely shredded zucchini in multiple layers of paper towels then squeeze over a sink until all excess moisture has been removed
Gently fold zucchini and 1/2 cup chocolate chips into muffin batter. Avoid overmixing.
Fill each muffin liner 3/4 full with batter then top with reserved chocolate chips.
Bake for 18 to 20 minutes or until a toothpick inserted into the center of a muffin comes out with a few moist crumbs. Avoid overbaking.
Allow muffins to cool in baking pan for 5 minutes then place muffins on a wire rack to cool completely.
After muffin tin has cooled completely, repeat the baking process for the remaining batter.
Cover and store muffins at room temperature up to 3 days.