Combine the Vegetables: In a large bowl, combine the chickpeas, cucumber, bell pepper, cherry tomatoes, and red onion.
Add the Herbs and Capers: Stir in the parsley, mint (if using), and capers until well mixed.
Prepare the Dressing: In a small bowl, whisk together the olive oil, lemon juice, red wine vinegar, cumin, salt, and black pepper until the dressing is well combined.
Dress the Salad: Pour the dressing over the chickpea mixture and toss it well to coat all of the ingredients evenly.
Chill (Optional): Cover the salad and refrigerate it for 15 minutes, to allow the flavors to meld.
Taste and Serve: Taste the salad and adjust the seasoning if needed. Serve it chilled or at room temperature, garnished with feta.