Combine ingredients in a bowl and stir. Season to taste with more salt.
Video
Notes
Use a sharp chef's knife to mince the parsley. Dull knives can bruise the herbs and make them bitter.
Wash and dry parsley before chopping. The parsley should be completely dry for best results.
If you don't have a microplaneto zest the lemon use a peeler to gently peel the yellow skin from the lemon. Be careful to avoid the bitter white pith (the white layer below the skin). Use the sharp knife to mince the zest as finely as possible before adding to the gremolata.
Don't use a food processor. Gremolata is best when made by hand. The food processor is great when making a paste like pesto, but the best gremolata relies on evenly minced fresh herbs.