Ingredients

2 medium carrots, cut into 2-inch pieces 

2 celery stalks, cut into 2-inch pieces 

1 small onion, quartered 

3 tablespoons red-wine vinegar 

10 whole black peppercorns 

1 pound medium shrimp (about 36) 

1 tablespoon ground cumin 

1 teaspoon paprika 

1/2 teaspoon cayenne pepper 

1 tablespoon minced garlic 

3 tablespoons fresh lemon juice 

2 teaspoons olive oil 

1/3 cup finely chopped flat-leaf parsley 

1/3 cup tomato juice 

1/3 cup chopped fresh cilantro leaves 

1/2 teaspoon salt 

1/8 teaspoon freshly ground pepper 

1/8 teaspoon freshly ground pepper 

Preparation

In a large saucepan, combine 2 quarts water, carrots, celery, onion, vinegar, and peppercorns; bring to a boil. Reduce heat; simmer for 20 minutes. Return to a boil and add shrimp. Cook them through, about 3 minutes. Drain shrimp. Remove shells, leaving tail section intact; devein.

Whisk together remaining ingredients, except greens. Add shrimp; toss to coat. Refrigerate for at least 1 hour or overnight. Let stand at room temperature 30 minutes before serving. Serve shrimp on the greens with marinade for dipping.