Dunno. Even in major cities like Delhi, it's not that easy or convenient to go look for a fastfood restaurant, I doubt Varanasi would be any better. Anyway don't let the pple in here scare U so much. If U stick to my basic rules, U should be fine. So far the Western style restaurant I've come across all CMI. In any case, McDonalds is basically localized Indian so there's basically only Chicken on the menu(think they was filet O'Fish). Their KFC totally CMI
IMO better to stick with Indian Food, cheaper and taste way better then most other stuff. If you still think the local restaurant look CMI, stick to the Hotel Restaurants
Oh and I almost forgot, Make sure you dont put any ice in your drinks.