Step 1

In a medium saucepan, combine shrimp, cold water, lemon juice, lemon halves, dill sprigs, parsley sprigs, sugar, whole peppercorns and salt. Cook over medium heat, stirring often, until pink and firm to the touch, about 8 to 10 minutes.

Step 2

Remove pan from heat, cover, and let shrimp sit in broth for 2 minutes. Meanwhile, fill a medium bowl with ice water. Drain shrimp and discard lemon halves, herbs, and spices.

Step 3

Immediately plunge shrimp into ice water until chilled, about 3 minutes. Remove from ice water and pat dry with paper towels. Cut shrimp in half lengthwise and then into thirds.

Step 4

In a medium bowl, whisk together mayonnaise, celery, shallot, lemon juice, dill, and parsley. Add shrimp and toss to combine. Season to taste with salt and pepper (I like 1/2 teaspoon salt and 1/4 teaspoon pepper).