Pat LaFrieda Meat Purveyors it created the customized hamburger patty for Keith McNally's Minetta Tavern. Pat LaFrieda Meat Purveyors Pat LaFrieda Meat Purveyors is a third generation meat wholesaler based in North Bergen, New Jersey that specializes in dry-aged steaks and artisanal burger patties but also supplies selected cuts of beef, pork, poultry, veal, lamb and buffalo. The company provides meat for the “Black Label Burger” at Minetta Tavern, as well as other signature custom blends at New York City restaurants such as Shake Shack, Spotted Pig, Union Square Café, Blue Smoke and Market Table. Pat LaFrieda Meat Purveyors began when Anthony LaFrieda (Pat
Hamburger critics like Josh Ozersky, a food editor for "New York Magazine", claim that this sandwich was not a hamburger because the bread was toasted. One of the earliest claims comes from Charlie Nagreen, who in 1885 sold a meatball between two slices of bread at the Seymour Fair now sometimes called the Outagamie County Fair. The Seymour Community Historical Society of Seymour, Wisconsin, credits Nagreen, now known as "Hamburger Charlie", with the invention. Nagreen was fifteen when he was reportedly selling pork sandwiches at the 1885 Seymour Fair, made so customers could eat while walking. The Historical Society explains that