Plot: Thai food is on the menu so Diana enlists the help of mentor and Thai food enthusiast, Gary Mehigan, who is an expert at striking the balance of salty, sweet and sour. After sampling Gary’s refreshing prawn larb, Diana explores the varieties of fresh Asian herbs at the Springvale market, before heading back to the kitchen to recreate a delicious dish she sampled on a recent trip Thai yellow crab curry with vermicelli noodles