Rumall stock was a kind of flavored liquid preparation used in cooking food.
In 2370, Rumali stock was an ingredient in the broth of a stew cooked by Gideon Seyetik for the senior staff of Deep Space 9. For the broth, a liter of clear Rumali stock was mixed with a tumbler and half of Gremish, two clusters of Vulcan redspice, half a dozen of Humat pods, and a dash of ice salt. The broth was reduced in an Andorian boiler, then cooked at exactly 500 degrees Kelvin and peppered to taste. The recipe for the dish took years to perfect, and Chief O'Brien wanted a copy. (DS9: "Second Sight")