The thai chef on irving @21st-ish is no more, but the space is still a Thai restaurant, called Chabaa. They opened like 2 weeks ago. Not much has changed, since thai chef was pretty new. Hopefully they can make a go at it. What I had there (some seafood pot, duck, chicken satay app and a mild soup) was all pretty good, and nicely priced. Enough to take some home despite us being 3. Service charming but a bit erratic (it was packed, which they were pleased with but did not really expect).