Joojeh Kabab are known for their yellow color. Some recipes call for turmeric which contributes to their color. However, the predominant ingredient is saffron. Saffron is derived from a flower known as the saffron crocus. The stigma and styles, known as threads, are collected and dried and sold as saffron threads. Saffron is used in many Middle Eastern and Indian dishes and is the world's most expensive spice by weight!