1. In a large bowl, combine the chickpeas, diced cucumber, finely chopped red onion, halved cherry tomatoes, crumbled feta cheese, chopped parsley, chopped dill, and sliced kalamata olives (if using).
2. In a small bowl, whisk together the olive oil, red wine vinegar, lemon juice, minced garlic, dried oregano, salt, and pepper until well combined.
3. Pour the dressing over the salad and toss gently to coat all the ingredients evenly.
4. Serve immediately, or chill in the refrigerator for about 15-30 minutes to allow the flavors to meld together.