Bring water, juice of 1 lemon and lemon halves, bay leaf, peppercorns, salt, and red pepper flakes to a boil in a large stockpot.
8 cups water, 1 lemon, 1 bay leaf, 2 teaspoons black peppercorns, 1 tablespoon kosher salt, pinch red pepper flakes
Turn off the heat and add shrimp. Poach for 4-5 minutes, or until the shrimp are firm to the touch and opaque.
1 pound uncooked fresh or frozen large shrimp
Drain and transfer shrimp to an ice-water bath until cool. Drain the shrimp and transfer them to a paper-towel-lined plate when finished.
In a large mixing bowl, combine mayonnaise, sour cream, Dijon, lemon juice, dill, chives, salt, black pepper, garlic powder, red pepper flakes, celery, and red onion. Stir until combined.
1 cup mayonnaise, ¼ cup sour cream, 1 tablespoon Dijon mustard, 1 lemon, ¼ cup chopped fresh dill, 2 tablespoons fresh minced chives, ½ teaspoon kosher salt, ½ teaspoon freshly ground black pepper, 1 teaspoon garlic powder, pinch red pepper flakes, 2 ribs celery, ¼ cup red onion
Add poached shrimp and gently toss to coat. Adjust seasoning and herbs as needed.
Cover with plastic wrap and chill in the refrigerator for at least 30 minutes, or up to overnight.
Garnish with more dill and chives before serving on lettuce leaves or bread. Enjoy!
Butter or Boston lettuce leaves