Grate the zucchini and add it to a strainer on top of a bowl. Let it sit there a few hours to give the zucchini time to drain out some of the water/zucchini juice. This will help with the overall moisture content. Set aside in the refrigerator at least three hours.
Preheat oven to 350 degrees.
Mix together the dry ingredients and whisk well.
Add in the wet ingredients - except the zucchini - and mix well with a hand mixer.
Remove the zucchini front the fridge and press out any extra water still remaining between two paper towels (See video for demonstration).
Fold the zucchini into the bread mix with a spatula or spoon.
Grease the pan with a cooking spray and line the bottom with parchment paper.
Add the batter to the pan and make sure its nice and even.
Bake for 40 minutes and then check with a toothpick or bamboo skewer. If you're using two small pans that are not deep then this should take 40 minutes. If you're using a full sized bread pan then this can take up to 60/65 minutes.
Let the bread cool for 1 hour once it is removed from the oven. Slice and enjoy!