This version of bún kèn, a deeply delicious street food specialty of Kiên Giang Province in southern Vietnam, comes from the chef Diep Tran, who traveled to the region while researching “The Red Boat Fish Sauce Cookbook,” written with Cuong Pham and Tien Nguyen The dish is built by infusing fish stock with aromatics and coconut cream, then ladling this fish curry over rice noodles and topping the bowls with fresh herbs, vegetables and a drizzle of sweet and salty coconut nuoc chăm While you can often find yellowtail collar at Japanese and Korean markets in the United States, Ms