(KGT 83f):  The term for food of any kind (including beverages) is Soj. An individual dish or course is called a nay', and a full meal usually consists of four or five nay'mey (dishes), though a non-Klingon might prefer to start with one or two. 

(KGT 100ff.):  In some restaurants, the menu (HIDjolev) is posted (seldom are individual copies available), but in most, the patrons know the regular fare and ask about specials, including the DaHjaj gheD (literally, "today's prey"), a dish whose components depend on what animals the restaurant's hunters were able to bring in.

(st.klingon 6/1997):  DaHjaj also behaves as a noun (as opposed to an adverbial element) in such noun-noun constructions as DaHjaj gheD "today prey" or "today's prey", a term often heard in Klingon restaurants with a meaning comparable to "catch of the day".