Do you have a recipe calling for lemon zest? Lemon zest, orange zest, lime zest, any citrus fruit can be zested. The zest is the colored outer rind or peel of citrus fruit. Citrus zest is used in cakes, breads, and cookies.
To make zest take the clean fruit and rub it over a hand grater, or peel thin strips with a small kitchen knife. Another way is to use a citrus zester; a handy kitchen tool made especially for the job. Finely mince the zest and then add to the recipe.