Ingredients:
Combine shiitake mushrooms and
3 cups of the chicken stock in a small saucepan and bring to a simmer.
Remove from heat and let stand until mushrooms are tender and broth is
flavorful, about 30 minutes. Remove mushrooms and discard stems. Thinly
slice caps and reserve. Strain broth through a fine mesh sieve, combine
with the remaining chicken stock and set aside.
In a medium saucepan heat the vegetable oil and, when hot, add the ginger,
garlic and crushed red pepper; cook for 2 minutes, or until fragrant. Add
the chicken stock and reserved shiitakes and bring to a simmer. Cook for
30 minutes. Add the chicken or tofu and stir to combine. In a small bowl
or cup, combine the lime juice and cornstarch and stir until smooth. Whisk
the cornstarch mixture into the hot soup and bring to a boil. Reduce heat
to a simmer and cook for 5 minutes. Add the soy sauce and sesame oil and
serve the soup, drizzled with hot chile oil to taste, and garnished with
some of the sliced scallions.