what is 1 zest of lemon grated?

One zest of lemon grated refers to the outer yellow peel of the lemon, which is removed using a grater or zester. This part contains aromatic oils that impart a bright, citrusy flavor to dishes without the acidity of the lemon juice. It's often used to enhance the taste of baked goods, dressings, and marinades. Just be sure to avoid the bitter white pith beneath the zest.