Mix turmeric powder, salt, sambhar powder and rice powder and marinate the yam pieces for 10 minutes.
In a tawa or flat pan arrange the yam pieces and drizzle some oil and fry it.
Flip the other side and cook well.
Serve with Rasam rice or sambhar rice.
You can make the same recipe with raw banana and brinjal.
For those you don't have to steam it, you can make it directly.