Toss cucumber and red onion slices together in a colander with kosher salt. Set colander over a bowl and allow to sit 30 minutes to drain the extra water from the cucumbers.
Once cucumbers have drained, use paper towels to gently blot any remaining moisture from cucumbers. Place cucumbers and onion in a large bowl.
In a small bowl, whisk sour cream, vinegar, garlic powder, sugar, and salt and pepper to taste.
Pour sour cream dressing over cucumbers and add basil. Fold salad until evenly coated and season with salt and pepper to taste if needed. Refrigerate salad until ready to serve and enjoy!
Notes
Storing InstructionsStore salad in refrigerator up to 2 days.