Steak Tartar was the invention of a restaurantuer, in some big city, could have been NY or chicago, or even Kansas city. (YCLIU)

I got something different upon Look It Up -- but nonetheless would not bet against the story cited above:

The earliest ancestor of the burger can be found in, of all places, medieval Russia. In the 13th century, when nomadic Tartars conquered much of Russia and Eastern Europe, they introduced the region to one of the fastest of foods — chopped raw beef. Inhabitants of the Baltic region developed a taste for the raw meat and began to season it with salt, pepper and onion juice. Thus was born steak tartare. (emphasis added)