Tasting the local delicacies is a huge part of travel – and one we can't wait to get back to when it's safe to do so. Traditional recipes are interwoven with culture, history and identity in cities and countries around the world. So what happens when it isn’t exactly clear where a certain food or recipe originated? From counter-claims to places that have a long-running beef (burger) with one another, here are a few tasty dishes people get a bit testy over...