boil potatoes .Peel , mash and mix chopped green chilli,coriander leaves,chat masala,chili powder, salt to mashed potatoes
Heat oil in a deep fry pan or kadai. When the oil is hot enough, do the heat test by dropping a drop of batter, it must raise in the oil slowly and should not sink or turn brown quickly. Dip each ball and drop in the hot oil. Each batch you can fry about 3 to 4 balls depending on the size of your pan and oil used. After a minute begin to stir and fry until golden.
If u want to avoid oily bonda u can cook in appan pan.Dip aloo bonda masala in besan batter and place into the cavities and pan fry until browned and crisp.