There's a well-worn joke about how the Chicago Mother-in-Law got its name. As Gustavo Arellano wrote in his book " Taco USA: How Mexican Food Conquered America," tamales have been served in Chicago since before the World's Columbian Exposition in May 1893. RELATED: The only sugar-rimmed margarita worth drinking is in Chicago Steven Alvarez, a professor at St. John's University …