When night falls, the main strip of Mae Sai sees many street food carts open.
This is Khao Laam (sweet sticky rice in bamboo)
Lots of the vendors are Tai Yai (you can tell because their pasa Thai sounds different and not so fluent) so Tai Yai food is found abundantly
Khao Ji Tai-Yai style (they put a sweet sauce on top)
Khao Tam Nga (Sticky rice pounded with sesame)
This is a quintessential Tai Yai dish. I keep forgetting the name. Essentially it is rice flour made into a thin batter. You add lime joice, chilli, fish sauce, vegetables, meat, egg and then steam it.
In some of the stalls, you eat sitting on the floor. You certainly don't see this often in Bangkok. Anybody seen this in other parts of Thailand?
Another Tai Yai food. This is for "gin len" (snack). You take a slice of the Makok fruit (I've never seen this outside Thailand) which is like a very sour,hard, mini-apple and dip it in a dried nam prik.