We just came back from having the lunch buffet at Shandiz $12.38 with Tea or Soda. They are located on the NW corner of Parker & Coit in Plano. I would highly recommend it to anybody who like middle eastern food. There food is heavy on Lamb as you would suspect with the typical persian spread of Kabab's, fish and chicken.
The also had a version of Naan bread which is thinner than pita, yogurt dip and hummus.
Their food definitely has a different spice signature than Fadis or other middle eastern restaurants in town, their food is a slight bit spicer than other middle eastern places around the metroplex.
Overall I would say the food is quite good, definitetly tilted slightly to the American taste leaving out some of the vegetable dishes I have seen at other Persian restaurants that are not to the American taste.