Good idea. You could compare each country's traditional New Year's dinner, for example. What each food symbolizes, etc.
I don't think it's a good idea to write about the Chinese New Year's dinner. It varies through the whole country. For example, in the north people have dumplings while in the south they eat Tangyuan, which is the traditional food for Yuanxiao Festival (15 days after the CNY) in the north.
Anyway, I recommend that you write something about some VERY traditional food. For example, moon cakes are only availabe during Mid-autumn Day, while Zongzi is only eaten during the Dragon Boat Festival. Dumplings are traditional, but not a bond to a certain holiday. You can compare Mid-autumn Day with Thanksgiving in America. It's the second most important traditional Chinese festival.