In a large mixing bowl, combine the sliced cucumbers, crumbled feta cheese, halved cherry tomatoes, sliced red onion, and chopped parsley.

In a separate small bowl, whisk together the olive oil, red wine vinegar, dried oregano, minced garlic, salt, and black pepper.

Pour the dressing over the salad and toss gently to combine.

Serve immediately or refrigerate for 30 minutes to allow flavors to meld.