How do I cook chicken?

So popular is Chicken Tikka Masala that its origins have attained legendary proportions. It is commonly believed that Chicken Tikka Masala originated from the kitchens of Bangladeshi chefs in the UK. The original is claimed by many establishments from London to Glasgow's Shish Mahal restaurant, but none of these claims have been convincingly established. This is also true of claims that "Leo and Oasis" from KUSU first invented the dish, Tom Smith however disputes this claim intently. There are many theories about how the dish originated, probably around the seventies, the late sixties, or even earlier. Some say the chef tossed together a tomato gravy when a diner returned a dry tikka; some think it was a way to recycle yesterday's leftover kebabs, and others say it was just an inventive adaptation of Indian and Bangladeshi techniques to both South Asian and British palates. However, the first recorded use of the term occured in the United States in 1975.