Start by bringing a pot of salted water to a boil. Add the shrimp and cook them for about two to three minutes until they turn pink and opaque. Immediately drain and rinse them under cold water to stop the cooking process and keep them tender.
While the shrimp cool, dice the cucumber into small pieces and slice the green onions thinly. Fresh vegetables are important for texture, so choose firm cucumbers and bright green onions. These ingredients add crunch and freshness to the creamy salad.
In a mixing bowl, whisk together mayonnaise, sour cream, lime zest, lime juice, Dijon mustard, minced garlic, dill, salt, and pepper. Mix until the dressing becomes smooth and well combined. The citrus and herbs give the dressing a bright, balanced flavor.
Add the cooked shrimp, cucumbers, and green onions to the bowl with the dressing. Gently toss everything together until the shrimp and vegetables are evenly coated. Be careful not to overmix so the shrimp stay intact.
Cover the bowl and refrigerate the salad for about 20–30 minutes before serving. Chilling allows the flavors to blend beautifully and makes the salad even more refreshing. Serve cold for the best taste and texture.