In a mixing bowl, add the besan, ajwain, and salt, mix it once, add water slowly and gradually to make a semi-thin batter, and whisk well while adding water to ensure a lump-free and smooth batter.
Rest the batter for 10-15 minutes.
Take a roti, add some of the potato mixtures and spread evenly, close it with another roti just like a sandwich, again spread some potato mixture on roti and spread evenly and close it with the third roti.
Heat oil on medium heat for frying.
Cut the roti into 4 parts diagonally into triangles, further dip into the batter, and coat well.
Deep fry the pakoras in hot oil on medium-high heat until crisp & golden brown in color.
Take out into a wire rack and serve hot with chutney.