Mix flour, salt, soda, cinnamon, and baking powder; set aside.
Beat eggs until foamy, add sugar, oil, zucchini and vanilla; mix well. Add flour mixture, mix until blended. Fold in nuts (optional) Divide dough and place in two 9x5x2" greased loaf pans and bake for 1 hour at 325 degrees or 4 greased mini loaf pans for 40 minutes
May need more flour depending on moistness of zucchini