Even after winning a Michelin star for his restaurant, Upstairs Tasting Room in Ho Chi Minh City, the biggest source of chef Hiep Truong’s inspiration remains the same: his mother and the family table. The dish closest to his heart – the one that reminds him most of home – is the vit hon, a traditional Central Vietnamese dish where duck meat is braised with lemongrass, turmeric, coconut water and fermented shrimp paste. At his intimate tasting room in the Vietnamese city, the duck is dry-aged...