Toss cucumbers with a few generous pinches of salt in a small bowl; firmly squeeze several times with your hands to release excess water. (bonappetit.com)
Combine horseradish, vinegar, and a large pinch of salt in a small bowl; let sit 5 minutes. (bonappetit.com)
For the topping: Whisk together the remaining sour cream, the lime juice and a pinch of salt in a small bowl. (foodnetwork.com)