Creating this Cucumber and Feta Salad is straightforward. Follow these easy steps:

1. Prepare the Cucumbers: Dice the cucumbers into bite-sized pieces. If the skin is thick, consider peeling them for a smoother texture.
2. Chop Cherry Tomatoes: Halve the cherry tomatoes and set them aside.
3. Finely Chop Onion: Dice the red onion finely to ensure it distributes evenly throughout the salad.
4. Combine Ingredients: In a large bowl, combine the diced cucumbers, cherry tomatoes, chopped red onion, and parsley.
5. Add Feta Cheese: Gently fold in the crumbled feta cheese, being careful not to break it down too much.
6. Prepare the Dressing: In a separate bowl, whisk together the olive oil, red wine vinegar, salt, pepper, and oregano (if using).
7. Dress the Salad: Pour the dressing over the salad mixture and toss gently to combine all ingredients.
8. Chill: For best results, let the salad chill in the refrigerator for about 15 minutes to allow the flavors to meld.
9. Serve: Give it a final toss before serving, ensuring that the dressing coats all ingredients evenly.