Za'atar is also known as Zaatar, Zahatar Za'tar and Zahatar. This seasoning is a delightful blend of dried herbs, sesame seeds, and sumac, and usually salt. The regional variations can be quite different – think of it like the various salsas that we use in the US. While there is no right or wrong salsa practically everybody can find a variation they like best (chunky, with black beans, hot, mild, etc.).