Steps
1. In a medium bowl, combine the cucumber, tomato, olives, red onion, and feta cheese.
2. In a small bowl, whisk together the olive oil, red wine vinegar, dried oregano, salt, and black pepper until well combined.
3. Pour the vinaigrette over the salad ingredients and toss gently to coat evenly.
4. Let the salad sit for 5 minutes to allow flavors to meld before serving.