Step 1: Preheat your oven to 350°F (175°C). Lightly grease a 9×5-inch loaf pan or line it with parchment paper, leaving an overhang on the sides for easy lifting.
Step 2: Shred the zucchini using a box grater or food processor. Place the shredded zucchini in a clean kitchen towel and squeeze out as much excess moisture as possible. This is crucial for a perfectly textured loaf.
Step 3: In a large mixing bowl, whisk together the Greek yogurt, honey (or maple syrup), eggs, and vanilla extract until the mixture is smooth and well combined.
Step 4: In a separate medium bowl, whisk together the whole wheat flour, rolled oats, baking powder, baking soda, ground cinnamon, and salt. Ensure there are no lumps.
Step 5: Gradually add the dry ingredients to the wet mixture, stirring gently with a spatula or spoon until just combined. Be careful not to overmix, as this can lead to a tough bread. Gently fold in the squeezed shredded zucchini and any optional add-ins like nuts or chocolate chips.
Step 6: Pour the batter evenly into the prepared loaf pan. Bake in the preheated oven for 45-55 minutes, or until a wooden skewer or toothpick inserted into the center of the loaf comes out clean or with a few moist crumbs attached.
Step 7: Allow the bread to cool in the pan for about 10-15 minutes before carefully transferring it to a wire rack to cool completely. Slicing the bread when it’s still warm can cause it to crumble, so patience is key!