In a bowl, add all the batter ingredients including besan and spices. Add little water as needed to make a thick flowing batter. Let it rest for 10-15 minutes.
Peel and slice the potatoes into thin slices about ⅛ inch thickness and spread them on a large plate. Sprinkle all the spices for potato on them.
Heat oil in a kadai or deep fryer on medium-high flame. To check if the oil is ready for frying, you can put a drop of gram flour batter into the oil. It should take about 2 seconds to float up, on medium high heat.
Take each potato slice and dip in the batter to coat each side evenly. Add them carefully in the medium hot oil. Don't overcrowd the pan. Fry in batches so they do not overlap.
Using a slotted spoon, remove the pakoras and transfer to a plate lined with paper towel to drain excess oil.Fry till the potato fritters are golden and crisp on all sides. Use a slotted spoon to turn them few times while they cook evenly.
Serve the aloo pakora hot or warm with Indian green chutney or tomato ketchup. Sprinkle some chaat masala, and enjoy!