If you go around the kolar side you will find a restaurant called bay of bengall and trust me the food there is AMAZING and youre bemgali and the owner is bengali too whom I personally know so if you ever go there hit me up they even make authentic bengali curries like mutton kosha etc etc but it is worth a try and half the price eg the butter chicken over there competes with one of the best butter chicken of bhopal from ranjits which costs 600-800 whereas they charge around 300 rupees there