Heat oil in a pan.
Add mustard seeds and allow to splutter.
Then add curry leaves, crushed garlic and green chilies. Fry for a minute.
Turn off the heat and add the turmeric powder.
Give a mix and then add the fried peanuts, boiled and smashed potatoes, salt.
Mix everything well and allow to cool down completely.
In a mixing bowl, take besan, turmeric powder, salt and baking soda. Mix well.
Add water little by little to get a smooth batter. But, the batter should not be very thick or thin.
Heat oil in a deep pan for deep frying.
Now make balls with 2 tbsp of the stuffing at a time and keep in a plate.
Dip one ball at a time into the batter to coat well and then gently drop into the hot oil.
Drop few more balls to the oil, but dont overcrowd the pan.
Deep fry till golden from all the sides, and drain onto a plate lined with paper towels.
Similarly fry rest balls.