In a mixing bowl, add gram flour, rice flour, red chilli powder, salt, eno fruit salt(optional) and hing and mix well. Add water little by little and make it to a thick batter like idli batter.
Wash and dry the bajji chilli with a clothes. Slit the chilli length wise and remove the seeds from the green chillies.
Optional – Stuff each slit green chillies with onion-coriander leaves and keep it aside. Heat oil in a pan, When the oil is hot enough, take one stuffed chilli and dip it in the bajji batter and coat it nicely and then gently drop it in the hot oil.
Fry the bajji in medium flame till it becomes golden brown and becomes crispy too. Remove the fried bajji and place it in paper towel to drain excess oil.
Repeat the step for the rest of the stuffed chillies.