At the Ethnic Market highlights international specialty foods and ingredients you're very unlikely to find at your local Gristedes. The Japanese can claim responsibility for introducing kobe beef burgers to such temples of meat as the The Old Homestead Steak House. Now comes a startling new burger development: Japanese miniburgers. Actually they’re more like nanoburgers; each is barely the size of a nickel. If you’ve guessed by now that this snazzy little box doesn’t contain......