If you ask people in the city of Mexicali, Mexico about their most notable regional cuisine, they won't say street tacos or mole. They'll say Chinese food. Above the border, the population is mostly Latino, but Chinese restaurants are super popular there, too. Reporter Lisa Morehouse heads to the Imperial Valley on both sides of the U.S.-Mexico border to discover the history behind some dishes you won't find anywhere else. It's the latest episode in our series "California Foodways," stories at the intersection of food, culture, economy and history.