Preheat oven to 350 degrees. Grease 2 bread loaf pans.
Sift together flour, salt, baking powder, baking soda and cinnamon.
Beat eggs. Add and mix well sugar, vanilla and oil. Add zucchini to egg mixture. Add dry ingredients, mixing well. Stir in nuts if desired. Pour to the prepared pans.
Bake for 1 hour or until knife inserted in the center comes out clean.