Preheat & Prep: Preheat the oven to 325 °F (163 °C). Lightly grease an 8×4-inch loaf pan and set aside.
Mix Dry Ingredients: In a large bowl, whisk together flour, salt, baking powder, baking soda, and cinnamon powder until evenly combined.
Add Wet Ingredients: Add Greek yogurt, vegetable oil, honey, egg, and vanilla extract to the dry mix, stirring until just combined.
Add Zucchini: Grate zucchini and squeeze out any excess moisture. Then add the zucchini to the batter and fold it in until evenly incorporated, but don’t over-mix.
Bake: Transfer the batter to the prepared loaf pan and bake for 55-60 minutes, until a toothpick inserted in the center comes out clean.
Cool & Rest: Let the bread rest in the pan for 10 minutes, then transfer to a wire rack to cool completely. Cooling helps the crumb set, allowing clean slicing.