A Cardassian stew usually eaten with yamok sauce, discussed by Miles O'Brien and the Cardassian officer Daro in Ten Forward during the episode The Wounded.
Sem'hal stew is a traditional Cardassian dish, generally taken with yamok sauce.
It is mentioned in The Next Generation episode The Wounded, set in 2367, the story that introduced the Cardassians. With a Cardassian delegation aboard the Enterprise-D while Picard hunts for the renegade Captain Maxwell, the young officer Daro approaches Miles O'Brien in Ten Forward and tries to make conversation. Food and drink are the safest ground they can find: the talk turns to kanar, which O'Brien says he never acquired a taste for, and to sem'hal stew with yamok sauce.
The exchange is a brief truce before O'Brien explains what the war did to him. Yamok sauce went on to become a running joke in the first season of Deep Space Nine.