Persillade

Persillade (French pronunciation: ​[pɛʁsijad]) is a sauce or seasoning mixture of parsley (French:persil) chopped together with seasonings including garlic, herbs, oil, and vinegar.

In its simplest form, just parsley and garlic, it is a common ingredient in many dishes, part of a sauté cook's mise en place. If added early in cooking, it becomes mellow; but when it is added at the end of cooking or as a garnish, it provides a garlicky jolt. It is extensively used in French and Greek cuisines, as well as in Cajun, Louisiana Creole, and Québécois cuisines.