Peel the potatoes. Slice them thinly using mandoline. Soak them in salted water till use. Drain and set aside.
Whisk together chickpea flour, rice flour, soda, spice powders, and salt and add water little by little to make a thick dough. Do not make it watery, or else it will end up soaking oil.
Heat oil till it is smoking hot. To check, drop a little of the batter, and if it sizzles up, the oil is hot.
Dip one slice of potato and coat. Drop into the oil. Add a few more till the pan is done. Flip and cook till both sides are golden brown.
Drain onto a kitchen towel and enjoy hot with a cup of hot tea...