au gratin

from WordNet (r) 3.0 (2006)

au gratin
    adj 1: cooked while covered with browned breadcrumbs (and
           sometimes cheese)

from The Collaborative International Dictionary of English v.0.48

Au gratin \Au` gra`tin"\ [F.] (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.
   [Webster 1913 Suppl.]