Preheat oven to 350 degrees. Lightly spray two 8 x 4 inch loaf pans with non-stick cooking spray.

Whisk together the flour, salt, baking powder, baking soda and the cinnamon, set aside.

In a large bowl, beat together the eggs, vegetable oil, vanilla, granulated sugar and the brown sugar. Stir in the flour mixture a little at a time until well incorporated. Stir in the zucchini. Stir in the blueberries. Pour equally into the prepared loaf pans. Top with additional blueberries, optional.

Bake for 75 to 80 minutes or until a toothpick inserted into the center comes out clean.

Cool on a wire rack in the pans for about 20 minutes. Remove from pans and cool completely before slicing.