If you had to serve a meal to an ambassador from another country that symbolized your country's culture, what would you choose? Do you think s/he would love it as much as you do?
Err a big Mac?
haha, no seriously though, this question assumes that you would love a meal that represents your country's culture! I wonder what sort of meal would represent a vague sense of disillusionment and loss of purpose in life, interspersed with football matches, nights out at the pub and reality television shows watched on a huge television paid with money that you never earned and will be paying through the nose for till you're 70? I'm not speaking for myself here of course, but I feel that this is the sort of cultural activity that most Britons participate in.
Most of other answers for this question seem to have taken it to be more like "what is the national dish?" or "what is most representative of your country's culinary culture?"
A fry up, a roast dinner, fish and chips, or chicken tikka masala then. And a deep-fried mars bar for afters. Oh, and washed all down with pint of bitter. Or ten pints.