Yamok Sauce is a popular Cardassian condiment.
Tojal in yamok sauce was considered a Cardassian delicacy. (DS9: "Destiny") Yamok sauce was also adapted to serve with Terran food, and was found to be enjoyable served with asparagus. (DS9: "By Inferno's Light") It could also be eaten on sand peas. (DS9: "The Way of the Warrior")
On Deep Space 9 in 2369, Broik ordered 5,000 wrappages of the sauce, which were worthless without Cardassians to consume it. Nog was able to acquire the sauce, and he and Jake Sisko traded it to a Lissepian captain for 100 gross of self-sealing stem bolts. (DS9: "Progress")
Aamin Marritza mentioned that his sem'hal stew could use a little yamok sauce. (DS9: "Duet")
Quark, in anticipation of a Dominion takeover of DS9, smuggled in 10,000 wrappages of the sauce, which was promptly dumped by station officials when discovered. (DS9: "Call to Arms") Later, during the Dominion occupation, Quark acquired ten crates of yamok sauce that he wanted Rom to unpack. (DS9: "Behind the Lines")
Background Information
Yamok sauce apparently cannot be replicated by DS9's food replicators. Aamin Marritza compliments the station's replicators on an excellent sem'hal stew (no doubt because they were Cardassian replicators) but goes on to complain that the stew could use a little yamok sauce, indicating that the replicators could not replicate it for him (DS9: "Duet"). Also, the fact that Quark occasionally purchase yamok sauce, instead of simply replicating it indicates that the replicators were unable to produce the sauce. This property of the sauce, however, is never made explicit. Its possible that Yamok is a brand name, like Slug-o-Cola, and because of some trade agreement cannot be legally replicated. However, Nog states that the Yamok sauce he is trying to sell is "original, not replicated," indicating that it is possible to be replicated, but the quality is lower.