Set your oven to 350°F (175°C) and allow it to fully preheat. This ensures even baking from the start.

Grease a loaf pan (9x5 inches) with a light coating of olive oil or line it with parchment paper. This helps the bread come out easily after baking.

In a medium-sized bowl, whisk together whole wheat flour, baking soda, cinnamon, and salt. Make sure the dry ingredients are well combined to avoid clumps in the batter.

In a large bowl, beat the eggs and honey together until smooth. Add the unsweetened applesauce, olive oil, and vanilla extract, and mix well until everything is fully incorporated.

Grate your zucchini (no need to peel it) and use a clean towel or paper towel to squeeze out any excess moisture. Add the grated zucchini to the wet ingredients and stir it in.

Gradually fold the dry ingredients into the wet mixture, stirring gently until just combined. Be careful not to overmix as this can lead to denser bread.

Pour the batter into the prepared loaf pan, spreading it evenly. Place the pan in the oven and bake for 50-60 minutes or until a toothpick inserted into the center comes out clean.

Once baked, let the bread cool in the pan for about 10 minutes before transferring it to a wire rack. This allows it to firm up and makes it easier to slice.