Masala Dosa @ Siddhivinayak Refreshments, Prabhadevi
The Dosa (Hindi:डोसा) Dosai (Tamil:தோசை) is a South Indian crêpe made from rice and lentils. Dosa is a typical South Indian food, taken as breakfast or dinner, and is rich in carbohydrates and protein. Regular dosa batter is made from rice and split, skinned urad bean (black lentil) blended with water and left to ferment overnight.
This particular one is stuffed with potato filling.
More details are available at Wikipedia