Begin by slicing the cucumbers into thin rounds. If you prefer, you can use a mandoline for even slices.

Place the sliced cucumbers and red onion in a large mixing bowl, tossing gently to combine.

In a separate bowl, whisk together the white wine vinegar, olive oil, yogurt, salt, and pepper until well blended. The mixture should be creamy yet tangy.

Pour the dressing over the cucumber and onion mixture, and stir gently until all the vegetables are well coated.

Let the salad sit for about 10 minutes to allow the flavors to meld.

Garnish with freshly chopped dill or chives before serving.