Gourmet hamburgers are what’s trendy these days. “Gourmet hamburger” is an oxymoron. You can spend hundreds, yes, even thousands of dollars on a hamburger. “Where is the best burger” is a regular topic in local papers, with florid descriptions of blue cheese, chipotle, bacon, pesto, avocado, mushrooms – or truffles! – with Kobe beef and even foie gras. Restaurants boast about their third-of-a-pound or half-pound or pound, high-calorie, high-fat burgers. What fast-food chain has the best burgers is an on-going argument.