(TrendHunter.com) For a limited time, KFC customers in New Zealand can get their hands on the saucy new Gravy Burger. Available for a limited time, the new Gravy Burger consists of a sesame seed burger bun slathered... (TrendHunter.com) For a limited time, KFC customers in New Zealand can get their hands on the saucy new Gravy Burger. Available for a limited time, the new Gravy Burger consists of a sesame seed burger bun slathered...