What is "tahchin"

Tahchin (also spelled as: Tah Chin, Tah-Chin) is an Iranian rice cake that includes rice, yogurt, saffron, egg, and chicken fillets. It is also possible to use vegetables, fish, or meat instead of the chicken fillets. TahChin is composed of two different parts: The thin Tahdig part which includes the chicken fillets, saffron, and other ingredients at the bottom of the cooking pot and the second part which is the white rice. In restaurants, Tahchin is mostly prepared and served without the white rice part.