Preheat oven to 350°F (175°C).
Grease your loaf pan well.
Grate zucchini using medium holes.
Don't squeeze out excess moisture.
Mix flour, baking soda, salt, and cinnamon together.
Beat eggs and sugar until light and fluffy.
Add oil and vanilla to egg mixture.
Fold dry ingredients into wet ingredients gently.
Stir in grated zucchini until just combined.
Pour batter into prepared loaf pan evenly.
Bake for 55-60 minutes until golden brown.
Cool in pan for 10 minutes first.
Transfer to wire rack to cool completely.