Mama's Pizzeria

It is true that Mama's cheese steaks tend to defy the proletarian nature of a street food sandwich most commonly made from stringy beef and Cheese Whiz. Good beef and a proprietary cheese mix (not Whiz, not even Provolone) are worked over thoroughly on the grill, causing the cheese nearly to vanish into the finished product, but saturate every bite. Onions are not cooked with the beef, which is the typical Philly way to do it. Instead, they are sautéed separately and added to the sandwich as it is assembled.