Mooncakes?where are the best
Mooncakes is a cake that is traditionally made for the Mid-autumn festival, which is a harvest festival on the Chinese Lunar calender, so it varies from year to year. This year it was sometime in September (it'll be the night of the full moon).
Mooncakes can be stuffed with any number of fillings, red bean paste, red bean paste with egg, mince meat, taro etc.
There is actually some folktales about it but I can't remember them off hand.
The best mooncakes are usually imported from Hong Kong, and are only available around the festival. You can find some in Chinatown at the various bakeries, but I'm not sure which one is the best.