Coconut Curry Soup Explosion 1/4 lb soba noodles 2 teaspoon coconut milk 2 cup chicken broth 1 lemon grass stalk (no leaves), cut into pieces 4 slice fresh galangal (thin slices), or ginger 3 tablespoon fish sauce 1 tablespoon curry powder (or more) 2 teaspoon grated lime peel (or finely minced) 2 tablespoon lime juice 4 hot red chilies seeded and slivered 2 teaspoon chinese chili sauce 4 chicken breast halves skinless, boneless 1 tablespoon oriental sesame oil 8 button mushrooms salt to taste cilantro sprigs for garnish ADVANCE PREPARATION: Bring 5 quarts of water to a rapid boil. Add the noodles and cook until just tender in the center, about 5 minutes. Immediately drain, rinse with cold water, and drain again. Mix in the cooking oil and set aside. In a 3-quart saucepan, combine the coconut milk, broth, lemon grass, galangal or ginger, fish sauce, curry powder, lime peel and juice, and chilies or chili sauce. Set aside. Cut the chicken into very thin bite-size pieces, then mix with the sesame oil. Thinly slice the mushrooms and set aside. LAST-MINUTE COOKING: Bring the soup to a simmer and cook over low heat for 20 minutes. Add the chicken and stir gently with a spoon to separate the pieces. Then add the mushrooms, noodles and salt. Turn into a soup tureen or individual bowls and garnish with cilantro sprigs. Serve at once. Serves: 4 as an entree, or as the soup course. Yield: 4