How did the Cuban sandwich become a symbol for a displaced people, win the hearts and bellies of America, and claim a spot on menus around the world? The odyssey of the Cubano begins with its hazy origins in the midnight cafés of Havana, from where it evolved into a dainty high-class hors d’oeuvre and eventually became a hearty street snack devoured by cigar factory workers. In The Cuban Sandwich, three devoted fans—Andrew Huse, Bárbara Cruz,...