- In a large bowl, combine the sliced cucumbers, halved cherry tomatoes, and thinly sliced red onion. 
- In a separate bowl, mix together the sour cream, mayonnaise, apple cider vinegar, garlic powder, dried dill, salt, and pepper until smooth. 
- Pour the dressing over the cucumber and tomato mixture, and gently toss to coat all the vegetables evenly. 
- Cover the salad and refrigerate for at least 30 minutes to allow the flavors to meld. 
- Before serving, give the salad a gentle stir and adjust seasoning if necessary.