I was excited to see so many lemang stalls this year :D If you've never tried one before, you're in for a treat. They're made from glutinous rice, coconut milk, wrapped in banana leaves, stuffed into a hollow tube of bamboo and slooooowly roasted next to an open fire for what seems like ages.
It takes a lot of patience to get this done to perfection, if the flames are too hot, you risk charring the rice, if the embers are burning too low then the rice will be undercooked. Prices are usually charged based on how big the bamboo is. Considering the amount of work and the fact that the tubes of bamboo can't be re-used, I think it's pretty decent.
Most sellers will help you use a huge knife to whack open the bamboo to remove the creamy, smokey fragrant rice inside. Lemang is traditionally eaten with curry or dried chicken/beef floss but I enjoy it with kaya.