Get ready for the latest 'On the Fly' challenge! Next up to take on the Eater test is Luis Herrera, executive chef-partner of Ensenada. His mission? Take a Peking duck (known also as Beijing duck), crepes, asparagus, tater tots, habanero peppers, and morel mushrooms, and turn it into a work lunch burrito that combines French, Chinese, Japanese, and Mexican flavors.