Take Rice flour in a pot. Keep aside.  Boil water. Take out a little water and keep aside to add if required.  Add jeera and ajwain, salt and karo. When boils,   Add green chillies paste and oil. When it starts to boil, pour it in the rice flour.

Mix well with a rolling pin to remove lumps. The mixture should have matho(shikhand) or whipped cream type of loose lumpy texture. 

Boil water in a steaming pot.  take a greased steam plate and put in the pot. Put flour mixture in it and steam until cooked.