Do not peel the zucchini before grating, leave the skin on.
Do not salt, drain out, or squeeze out any of the liquid from the zucchini.
Use the large grate of a box grater to grate 2 small (or 1 large) zucchini for 1 1/2 cups lightly packed grated zucchini.
Preheat oven to 350 degrees F. Spray a 9x5 inch loaf pan with cooking spray.
In a large bowl, add the grated zucchini, sugar, brown sugar, applesauce, oil, eggs, and vanilla. Whisk until well combined.
Add the flour, baking powder, baking soda, salt, and cinnamon. Stir just until no dry flour remains, trying not to over mix.
Pour the batter into the loaf pan. Bake for 50 to 54 minutes. A toothpick inserted into the center of the bread should come out with moist crumbs on it.
Cool in the pan for 10 minutes. Remove from the pan and transfer to a wire cooling rack to cool completely before slicing.
Store covered in the refrigerator. *This bread is best served after it has been refrigerated for at least 12 hours.