01 - Place the thinly sliced cucumbers, red onion, and chopped dill in a large mixing bowl.
02 - In a separate small bowl, whisk together the sour cream or Greek yogurt, vinegar or lemon juice, sugar, salt, and black pepper until completely smooth and well blended.
03 - Pour the dressing over the cucumber mixture and toss gently to coat all ingredients evenly.
04 - Refrigerate the salad for at least 30 minutes to allow flavors to meld before serving.