Ingredients

  • 2 tablespoons vegetable oil
  • Shells from 2 1/2 pounds medium shrimp (about 4 1/2 cups)
  • 2 shallots, peeled and sliced
  • 1 2-inch piece ginger, sliced
  • 2 cloves garlic, sliced
  • 2 tomatoes, chopped
  • 1 stalk lemongrass, bruised
  • 2 whole Thai chili peppers, sliced
  • Kosher salt and freshly ground black pepper to taste
  • 2 star fruits, very thinly sliced
  • 1 pound red snapper fillets, very thinly sliced
  • 1 lime, preferably key lime, halved
  • Cilantro leaves for garnish

Method

  • In a large, heavy kettle, heat the oil over high heat and add the shrimp shells.
  • Cook, tossing continually, for 2 minutes.
  • Add the shallots, ginger and garlic and continue to cook for 3 more minutes, or until the shells are lightly browned.
  • Add 10 cups of water, the tomatoes, lemongrass and chilies and bring to a boil.
  • Lower the heat and simmer, uncovered, until the liquid is reduced to 5 cups, about 1 hour.
  • Strain the broth, pressing down on the shells to extract as much liquid as possible.
  • Return the broth to the pot and season to taste with salt and freshly ground black pepper.
  • When ready to serve, bring the broth back to a simmer.
  • Add the star fruits and red snapper.
  • Lightly squeeze the lime over the soup and then drop it into the pot.
  • Simmer for 2 minutes, or until the fish is just cooked through.
  • Remove from the heat and serve immediately, garnished with cilantro leaves.