Preheat the oven to 350 degrees F. Spray a 9x5-inch loaf pan with nonstick spray.
In a large bowl, whisk together the flour, baking powder, baking soda, salt and cinnamon.
In a medium bowl, whisk together the honey, olive oil, egg, yogurt and vanilla.
Pour the wet ingredients into the dry ingredients and mix with a large wooden spoon or rubber spatula until combined. Fold in the zucchini, orange zest and chocolate chunks.
Spread the batter into the prepared pan (top with a few extra chocolate chunks). Bake for 40 to 50 minutes, until a toothpick inserted into the center comes out clean. If the top of the bread is browning too quickly, loosely cover it with a piece of foil.
Remove from the oven and se ton a wire rack to cool. Allow to cool completely before slicing and serving.
Notes
Add chopped walnuts, if you'd like- about 1/2 cup.