My Tho seafood noodle soup is different from Chinese noodle soup, nam vang soup, and Hue beef noodle soup, because it contains soy bean, lemon, chili, and soy sauce instead of herbs and lettuce.
Back in the 1960s, a shop in My Tho, 70 km from Ho Chi Minh City, started serving this dish using a secret recipe for the rice noodles. Ever since then, its reputation has grown to become a very well known meal in Vietnam.