In a small bowl, combine tahini, fresh lemon juice, olive oil, salt, and pepper. Whisk until smooth and creamy.

In a large mixing bowl, add your drained chickpeas, finely chopped red onion, fresh parsley, and drained tuna. Gently toss these ingredients together.

Pour the tahini dressing over your salad mixture and fold everything gently until well coated.

Serve immediately or cover and refrigerate to allow flavors to meld.