au gra·tin /oˈgrɑtṇ, ɔ, ˈgræ-/
Au gra·tin Cookery With a crust made by browning in the oven, especially by sprinkling with bread crumbs or grated cheese and browning in a broiler; as, spaghetti may be served au gratin.
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au gratin
adj : cooked while covered with browned breadcrumbs (and sometimes
cheese)