Prepare to Bake: Preheat oven to 350 F and lightly spray a 8 x 4 inch loaf pan with non-stick cooking spray or line with parchment paper.
Prep Zucchini: Grate the zucchini and place in a strainer to drain. You can squeeze it with your hand or use a spatula to press it against the side of the strainer to remove excess liquid. Alternatively, wrap the grated zucchini up in a dish cloth and squeeze out excess water.
Mix Dry Ingredients: Add the flour, baking powder, baking soda, nutmeg and salt to a large mixing bowl and stir well to combine. Make sure no clumps remain and the baking powder and baking soda have been thoroughly incorporated.
Add Zucchini: Add the drained grated zucchini to the dry ingredients and mix with a spatula until the pieces are distributed and coated in flour.
Mix Wet Ingredients: In a separate bowl, whisk together the coconut oil, yogurt, applesauce, vanilla and maple syrup. Note that it is important these are all room temperature otherwise the coconut oil will solidify. If you only have chilled applesauce and yogurt, warm them briefly in the microwave until they come to room temperature. If you're using an alternative oil or melted butter, no need to worry if the ingredients are chilled.
Combine Ingredients: Making a well in the centre of the dry ingredients, pour in the wet ingredients and gently fold together until all of the flour has been wetted, taking care not to over work the batter.
Add Walnuts: Gently fold in the crushed walnuts
Bake Loaf: Scoop the batter into the pan and shake or spread to even it out. Bake for 45-50 minutes or until a toothpick inserted into the centre comes out clean.
Cool and Slice: Let the loaf cool in the pan for at least 30 minutes then run a knife along the sides and carefully flip out the pan. Slice with a serrated knife and enjoy!