Begin by grating the zucchini using a box grater, then transfer it to a clean dish towel or paper towels and squeeze out as much excess moisture as possible. Set aside.
In a large mixing bowl, whisk together the eggs, sugar, and oil until the mixture is smooth and slightly frothy.
Fold in the grated zucchini until evenly incorporated, feeling the batter become slightly wetter but integrated.
In a separate bowl, sift together the flour, cinnamon, nutmeg, baking powder, and salt for even distribution of spices and leavening.
Add the dry ingredients to the wet mixture gradually, folding gently with a spatula until just combined; avoid overmixing to keep the bread tender.
If using, fold in nuts or chocolate chips for added texture and flavor.
Line your loaf pan with parchment paper or lightly spray with non-stick spray, then pour the batter into the pan, spreading it evenly.
Bake in a preheated oven at 350°F (175°C) for about 60 minutes, or until the top is golden brown and a toothpick inserted into the center comes out clean.
Remove the bread from the oven and let it cool in the pan for 10 minutes, then transfer to a wire rack to cool completely before slicing.
Slice the bread once cooled, revealing a moist interior with a slightly crusty top. Serve and enjoy!