These are actually vermicelli-rice flour string hoppers awaiting steaming on top of a pau steamer cover. The rattan dome is wrapped with a white cloth.
I found out that the South Indian Putu Mayam is from Venus and Putu Mayung is from Pluto. The pakcik hawker at the Ramadan bazaar noticed me giving the name on the banner a double take.
The intuitive man explained that in the north, it is known as Putu Mayung. It tastes just as wonderful with grated coconut and 'gula melaka' or coconut palm sugar.