Whisk olive oil, lemon juice, lemon zest, garlic, oregano, salt, and pepper together in a small bowl.

Dice cucumber, halve tomatoes, finely dice red onion, halve olives.

Combine chickpeas, cucumber, tomatoes, red onion, olives, parsley, and mint in a large bowl.

Pour dressing over everything and toss well until fully coated.

Fold in crumbled feta gently.

Let sit 15–20 minutes before serving. Taste and adjust seasoning.