Step 1: Thaw the Shrimp Properly. Remove your frozen shrimp from its packaging and place it in a medium bowl. Cover completely with cool water, letting it sit right on the counter while it gradually thaws. Change the water every thirty minutes to speed the process along.

Step 2: Drain and Chill the Shrimp. Once fully thawed, drain the shrimp in a colander and pat them dry gently with a paper towel. Transfer the shrimp to the refrigerator while you prep everything else.

Step 3: Chop Your Red Onion and Celery. Finely chop the red onion and dice the celery rib into small, even pieces.

Step 4: Whisk Together the Creamy Dressing. In a large mixing bowl, combine the mayonnaise, lemon juice, and lemon zest. Add the chopped dill, Dijon mustard, minced garlic, kosher salt, and black pepper, and whisk until smooth.

Step 5: Fold In the Onion and Celery. Add the chopped red onion and diced celery to the dressing bowl and stir gently.

Step 6: Fold In the Shrimp Gently. Once the shrimp are fully chilled, add them to the dressing mixture and fold everything together gently.

Step 7: Chill and Serve. Cover the bowl and refrigerate the shrimp salad for at least thirty minutes before serving.