First boil potato n cut into cubes.sprinkle chat masala.
keep it in refrigerator for 5 min

Then coating with flour by dipping it in cold water.
Keep in fridge for 5 min
then recoat it with crushed crackers by dipping it with crushed cracker by help of beated egg

Keep it in fridge for 10 mins

Now deep frying till golden brown color appears..