Shrimp and Avocado Seviche

Preparation

1. Step 1

   Fill a large pot with 1 quart water. Cut the 4 limes in half, and squeeze their juice into the pot; add the lime halves. Bring to a boil, then turn off heat; let the mixture steep about 10 minutes. Return to a boil.

   Step 2

   Add the shrimp to the pot. As soon as the water returns to a rolling boil, pour the shrimp mixture into a colander; discard the cooking liquid and limes. Return the shrimp to the pot; cover, and let stand 15 minutes. Transfer the shrimp to a baking sheet and spread them out; let stand until cool enough to handle.

   Step 3

   Peel and devein the shrimp, and cut them into thirds. Transfer to a medium bowl; stir in 1/4 cup lime juice and the scallions, chiles, vinegar, thyme, and oregano. Let stand at room temperature 1 hour, stirring occasionally.

   Step 4

   When ready to serve, stir the avocados, cilantro, and salt into shrimp mixture. Serve with tortilla chips.