Take besan in bowl add turmeric powder, Red chilli powder, salt,baking soda,mix well,add water little by little to make batter for vadas,keep aside.

Mash boiled potatoes,cut cheese in to small pieces.
Heat oil add cumin seeds,when splutters add cut onion,saute for 2 minutes,add green chilli paste,ginger garlic paste,saute 2 minutes,add turmeric powder mix well,add mashed potatoes,mix well,cook with lid for 5 minutes on slow flame,take it down,add cut green coriander,let it cool,now make small flat balls of stuffing

Now spread stuffing on palm,put cheese piece in middle.

Close the cheese and make round ball,stuff the cheese neatly in stuffing.

Now dip the stuffed ball in batter and drop the vadas in hot oil.

When you turn the vadas slow the flame n deepfry neatly,take out on tissue paper so that the extra oil should get absobed.

It's ready to serve,serve hot with Sev,cut onion,fried green chilli or with sauce.