Not merely a hamburger with fried onions, the onion-fried burger of El Reno, Oklahoma, is a patty of meat that gets put on the grill with a heap of thinly sliced onions on top. The chef presses down, mashing the onions into the raw meat; and when the burger is flipped, he presses down again. By the time the hamburger is done, the onions and meat have become inseparable – a savory/sweet package with an especially enticing aroma. “Onion-fried burger” is not listed on the menu of restaurants that serve it. In El Reno, when you order a hamburger, you will get an onion-fried burger unless you specifically instruct the cook to leave the onions out.