How to make chicken curry with potatoes

Almost in every Bengali home "Sunday Special mangsher Jhol" is must for lunch menu.
"Jhol" is a term that denotes liquid curry/ stew which is prepared with onion, tomato, ginger, garlic, seasonings and water (to make liquid). You can put cooked chicken, fish, egg or any non veg or veg ingredients in the curry and it will come out delicious.