Start by slicing two large cucumbers into thin slices along with the onion. You can use a mandoline slicer for uniformity or a sharp knife. In a small mixing bowl, mix the rest of the ingredients together.
Cover the bowl with plastic wrap and refrigerate for at least 15-30 minutes before serving. It's yummier when it's cold and crisp!
Before serving, give the salad a gentle stir to redistribute the dressing and season with additional salt and pepper if needed.