- 8 ounces shrimp, well chilled
- ¼ small onion, very finely chopped
- 14 ripe, medium-large tomatoes, cored, seeded and finely chopped
- 1 large egg yolk
- 2 tablespoons flour
- ½ teaspoon dried oregano
- A generous ½ teaspoon salt
- 1 tablespoon vegetable oil
- 1 small onion, thinly sliced
- 1 medium fresh chile poblano, roasted and peeled, seeded and sliced into thin strips 1 inch long
- 1 ripe, medium-small tomato, roasted or boiled , cored, peeled and roughly chopped OR ½ 15-ounce can tomatoes, well drained and roughly chopped
- About 4½ cups (½ recipe) fish broth
- Salt, about ¾ teaspoon
- ¼ cup loosely packed, roughly chopped fresh coriander (cilantro)
- 1 to 2 limes, quartered
- The shrimp mixture: Peel the shrimp and devein them by running a knife down the back to expose the dark intestinal track and scraping it out. Chop them finely: To chop by hand, use a large, sharp knife to cut the shrimp in small bits, then rock and chop, working the knife back and forth for several minutes, until the shrimp forms a coarse-textured paste. For machine chopping, either run the shrimp through the meat grinder fitted with the fine plate or use a food processor to chop the shrimp into a coarse puree (do it in two lots, pulsing 4 to 5 times for each lot). Place the shrimp in a mixing bowl.
- Add the onion, tomato, egg yolk, flour, oregano and salt, and mix thoroughly. Cover and refrigerate until you’re ready to finish the soup.
- The broth: In a large saucepan, heat the oil over medium. Add the onion and fry until just browning, about 7 minutes. Add the chile strips and tomato and fry for 3 or 4 minutes longer to reduce the liquid a little.
- Stir in the broth, bring to a boil, cover and simmer 15 minutes over medium-low heat to blend the flavors. Season with salt.
- Finishing the soup. Fifteen minutes before serving, poach the shrimp in the gently simmering broth: Drop in rounded tablespoons of the shrimp mixture, simmer gently for 8 to 10 minutes, then remove from the fire.
- Ladle the soup into bowls and sprinkle with the chopped coriander. Serve with the lime wedges on the side.