If you really want to get a good grasp on a uro diet, check out this website:
Deer Fern Farms Home Page: Uromastyx, Tortoises, Spinytailed Iguanas, Bengal Savannah cats
Deer Fern Farms Uromastyx Supplies,Reptile Supplies, UVB Bulbs, Vitamines
I have an egyptian uro and he's doing great. I feed him mixed veggies, mixed with Mazuri tortoise diet and dusted with Miner-al and Uromastyx dust. The first few years I had him I didn't use the Mazuri diet, but once I heard about it and started using it, he grew significantly. It's a staple of his diet now. Oh yeah, he also loves dandelion flowers. They are by far his favorite, especially when hand fed. They're also high in antioxidants, which is nice.
Craigo