Rice Soup with Chicken, Seafood, and Mushroom

An elegant preparation of northern Vietnam, this soup is special-occasion fare. Rather than simmering the rice until it disintegrates into a silky creaminess, the grains are cooked until their ends “bloom” into flowerlike petals, an effect achieved by parboiling the rice and then simmering it for a shorter time than for standard cháo. Tapioca pearls thicken the soup and lend an interesting shimmer, and the halved shrimp turn into pink corkscrews as they cook, adding a final flourish to the presentation.