The Ladybird food truck is easy to spot. It's a converted school bus with a burnt-orange paint job. It has been rolling on the streets of Houston since 2011, serving up tacos, sandwiches, franks and its signature tater tots. Its founder, Adrian de la Cerda, had worked 10 years for a non-profit organization when cutbacks squeezed him out of a job. But before he left, de la Cerda asked about the availability of its school bus with a turbo diesel engine. Now the bus is home to offerings such as a bacon-wrapped frank with smoked goat cheese and fresh jalapeno.