Preheat the oven to 350 degrees, and spray two 4.5 x 8.5 inch loaf pans with cooking spray.

Grate the zucchini with the largest holes in a box grater (just like cheese). Aim for about 2 cups of grated zucchini.

Next, in a medium to large sized mixing bowl, combine 2 cups of the flour with all of the sugar, baking power, baking soda, salt and cinnamon.

Add the applesauce and vegetable oil, then break the eggs into the glass measuring cup you used for the vegetable oil and beat them lightly before adding them to the batter. Add the vanilla.

Stir everything together. The batter will be pretty thick. Now add that last cup of flour and continue stirring until the flour is fully incorporated.

Fold in the grated zucchini and chopped walnuts (if using).

Divide the batter between the two prepared loaf pans.

Bake at 350 degrees for 55 minutes.