Fried onion burger

A fried onion burger, also called an Oklahoma onion burger, is a regional burger style and specialty of Oklahoma cuisine. The dish was created in El Reno, Oklahoma, in the 1920s by a restaurateur searching for a way to stretch ground beef with a less expensive ingredient in order to cheaply feed striking railroad workers during the Great Railroad Strike of 1922. Its primary ingredients are thinly-sliced onions and ground beef.

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