01 - Preheat oven to 350°F. Line a 12-cup muffin tin with paper liners or lightly grease with cooking spray.
02 - In a medium bowl, whisk together flour, baking powder, baking soda, salt, cinnamon, and nutmeg until well blended.
03 - In a large bowl, beat eggs with vegetable oil, sugar, Greek yogurt, vanilla extract, and lemon zest until smooth and fully incorporated.
04 - Fold grated zucchini into the wet mixture until evenly distributed throughout the batter.
05 - Add dry ingredients to wet mixture and stir gently until just combined. Do not overmix to maintain tender texture.
06 - Divide batter evenly among the 12 muffin cups, filling each about three-quarters full.
07 - Bake for 22-25 minutes or until a toothpick inserted into the center comes out clean.
08 - Let muffins cool in the pan for 5 minutes, then transfer to a wire rack to cool completely before glazing.
09 - Whisk together powdered sugar, lemon juice, and lemon zest until smooth and pourable. Adjust consistency with additional juice if needed.
10 - Drizzle glaze over completely cooled muffins and allow to set for 10 minutes before serving.