Chang Chang, web site, 1200 19th St NW, Washington, DC (Metro Trip Planner – opens in new window) [Google | Washingtonian | TripAdvisor | Michelin]
Yes, the real Mama Chang, mother of Peter Chang, at 84 years old. They even named a restaurant after her!
It is the best Chinese meal I have eaten outside of China, and in contention for broader honors as well.
Here is a photo of the menu, which says everything. There was no weak course.

Mama Chang Menu
The restaurant Chang Chang, in DC, hopes to do this again next year.