Combine the chickpeas, cucumber, cherry tomatoes, bell pepper, red onion, parsley, and mint in a large mixing bowl.
In a small bowl, whisk together the tahini, lemon juice, olive oil, garlic, water, cumin, salt, and black pepper until smooth.
Add more water if needed to reach a pourable consistency.
Pour the tahini dressing over the salad.
Toss gently until all the ingredients are evenly coated.
Let the salad chill for 10–15 minutes before serving for the best flavor.
Garnish with extra parsley or a sprinkle of sesame seeds if desired.