Preheat your oven to 350°F and coat two 8 1/2" x 4 1/2" bread pans with baking spray.
In a large bowl, cream together the oil, Greek yogurt, lemon juice, and sugar. Once combined, add in the eggs one at a time, beating well after each addition.
In a separate bowl, sift together the flour, baking powder, baking soda, and salt. Add in the lemon zest and stir to combine.
Add the dry ingredients to the wet ingredients and mix just until combined. Stir in the grated zucchini and vanilla extract.
Divide the batter evenly between the two prepared bread pans.
Bake for 55-60 minutes, or until a cake tester comes out clean. Allow the bread to cool for at least 10-20 minutes before removing it from the pan and placing it on a cooling rack.
Glaze:
Mix the lemon juice and powdered sugar together until well combined. Pour the glaze over the cooled bread on the cooling rack.
Topping:
Sprinkle the lemon zest over the top of the glaze. Enjoy!