Here's a look at the history and methodology of one of America's most talked-about foods: the Chicago deep-dish pizza. The culinary staple has been satisfying Chicagoans since 1943.

From looking at ads of the era, Regas estimates that the first dedicated pizzeria opened in 1906 in Chicago and sold a pie similar to Neapolitan, which was being served in New York.

Tori Allen has been part of the restaurant world for more than 14 years, working in Atlanta, Buffalo, Chicago, D.C., Denver, and Los Angeles. She's a proud Buffalo native and current Chicago resident.