ABOVE: Taco Bell&amp;#8217;s new Cantina Tacos are &amp;#8220;based upon authentic-style Mexican street tacos.&amp;#8221; An art form that evolved from hot dog carts, roach coaches &mdash; and the king of all mobile food purveyors, the taco truck &mdash; American &amp;#8216;street food&amp;#8217; has become wildly popular. From dessert and waffle trucks to mobile pizza ovens and the [...]