Step 1

Bring a large pot of salted water to a boil over high heat.

Step 2

Fill a large bowl with ice water.

Step 3

Add the shrimp to the boiling water and cook until opaque and cooked through about 2 minutes. Drain well, then transfer the shrimp to the ice bath. Let stand for 2 minutes. Drain well again.

Step 4

In a large mixing bowl, whisk together the mayonnaise, mustard, dill, lemon, salt, and pepper. Add the cooled shrimp, onion, and celery. Toss to combine. Cover and chill for at least 1 hour before serving.