Stewed bok-rat liver was a Klingon dish.
In 2373, stewed bok-rat liver was served aboard the IKS Rotarran. Jadzia Dax exclaimed it wasn't very fresh, but it would be better with the bloodwine she had brought from Deep Space 9. (DS9: "Soldiers of the Empire")
The script mentioned that the dish was "vile and slimy."