Begun Doi Sorse Posto bata Jhol or Eggplant in Mustard Poppy Seed Yogurt Gravy is a pure vegetarian dish. The eggplant is the star of this dish,flavored by the mustard poppy seed paste, tempered with Bengali five spices known as panch phoron, and cooked in yogurt stock. Poppy seeds or khus khus are deceptively innocuous