Rinse the chilies and slit each of them from one side. Remove seeds from chilies and deep them into salted hot water to decrease their spiciness.
Now in a mortal pestle, add cumin seeds, coriander seeds, fennel seeds and dry red chilli. Crush them into a coarse powder.
In a mixing bowl, add potatoes and mashed them. Then add coarsely ground masala, ginger paste, chopped green chilli, hing, amchur powder, garam masala, salt and chopped coriander leaves. Mix well
Now stuff all the green chilies well with the prepared potato filling and keep aside.
In a bowl take besan, rice flour, turmeric powder, salt, and baking powder. Mix well and add water gradually to make a medium-thick and lump-free batter.
Heat enough oil in a pan or kadai.
Once the oil turns hot, coat the stuffed chilies well in the besan batter and gently drop in the hot oil.
Fry them over medium flame till they are golden and crisp.
Once done, remove from oil and transfer to kitchen pepper to get rid of the excess oil.
Rajasthani mirchi vadas are ready to serve. Serve with green and tamarind chutney.