Christina Ngyuen and Birk Grudem fell in love at her vintage shop. The veteran bartender and self-taught cook opened a food truck selling an Argentinian-inspired sandwich - Hola Arepa was born. How this power couple went from a truck to two locations and several James Beard Award nominations. Plus: Sameh Wadi was the youngest and first Palestinian-American chef to battle on Iron Chef in 2010. He opened and closed a fine dining restaurant, Saffron, then a food truck, which graduated to a restaurant World Street Kitchen. We talk the future of dining in a post-pandemic world.