The American hamburger continues its world tour, picking up new flavors along the route. A bulgogi burger, using ground beef marinated for a day in Asian seasonings — garlic, brown sugar, sesame oil — is now on the menu at New York Hot Dog & Coffee in Greenwich Village. The seven-ounce patties are then grilled and topped with Napa cabbage slaw, sesame seeds and, as options, cheese, kimchi or hot sauce. Crunchy cornmeal-dusted fries can go alongside. GLOBAL FOOD SWAP New York Hot Dog & Coffee is a chain of 200 or so cafes in South Korea, owned by Mi...