Peel raw bananas and potatoes. Steam them in pressure cooker for about 5 minutes on low flame.
Cut green chilies in very small pieces. Mash steamed bananas and potatoes and add dry mango powder, salt and green chilies to it. Mix well.
Make small flat rolls of the mixture. (If the mixture sticks, apply little oil to hands.)
Dip the rolls in the bread crumbs or suji. Heat oil in frying pan and shallow fry the rolls.