Mix besan, maize flour, coriander powder, cumin seeds, ajwain seeds in a bowl.
Add some water and keep mixing till the paste is smooth.
Slice potato and onion. (Source: Thinkstock Images)
Heat oil in a kadai. (Source: Thinkstock Images)
Dip the thinly sliced pieces into the paste. (Source: http://www.youtube.com/watch?v=QI1vjlqujWw)
Drop them in the oil and cook till the pakoras turn golden on both sides. (SourcE: Thinkstock Images)
Take them out and remove the excess oil with the help of a tissue.