1Thinly slice cucumbers. Put the cucumbers in colander in sink. Sprinkle with one tablespoon of salt and gently toss. Let the cucumbers sit in colander for at least an hour or more to remove excess moisture from cucumber (longer if you have time)
2Rinse cucumbers when ready to use and pat dry with paper towel to remove excess water. This will help to keep your salad from getting too runny.
3In a medium bowl, combine sour cream, sugar, mayonnaise, vinegar, and black pepper. Stir well. Toss in cucumbers and onion. Stir to coat thoroughly. cover bowl and put into refrigerator. chill at least one hour before serving. Gently stir before serving.