Combine sliced cucumbers, tomatoes, red onion and Feta cheese in large bowl. Add salt, pepper to taste. Add seasonings and toss into salad.
Make a vinaigrette with red wine vinegar and olive oil, about 1/2 to 3/4 cup. Use a 1part vinegar to 3 parts olive oil ratio, or a cruet dressing measure.
Pour onto salad and toss to coat. Serve immediately or chill in refrigerator to cool.