READING THE LABELS. Pompeii was well known for its production and trade of garum, a fish sauce considered a delicacy of the ancient Roman diet. Whole amphorae made for garum were also recovered from the site (pictured above). Because garum was made from all kinds of fish (including shellfish and fish without scales), kosher law prevented Jews from consuming most garum. Evidence of kosher garum (called garum castum or garum muria) suggests that there were enough Jews living in Pompeii to create a market for the special variety of kosher garum.