Preheat oven to 350 F. Prepare 8 inch bread pan and spray with cooking spray.
In a medium bowl beat eggs with sugar; add zucchini and oil. Combine all ingredients.
In a separate bowl mix flour, baking soda, cinnamon, salt, baking powder.
Combine wet and dry ingredients.
In a separate small bowl mix sugar and cinnamon for cinnamon swirl.
Pour half the batter into the bread pan, sprinkle more than half of cinnamon swirl. Leave some to sprinkle on the top of the bread.
Pour another half of batter. Sprinkle rest of the cinnamon swirl on top to make a crunchy top.
Bake for 35 - 45 minutes.