Place the sliced cucumbers in a bowl and toss with the teaspoon of salt. Let sit for about 30 minutes then drain thoroughly. Add the sliced onions to the cucumbers.
To make the dressing: Place all remaining ingredients in a small bowl and stir to combine. Pour the dressing over the cucumbers and onions and stir to combine. Add more salt and pepper to taste.Cover and chill for at least 2 hours (4 hours if using dried herbs) before serving.
