Prep the veggies: Dice the cucumber and bell pepper, halve the tomatoes, and finely chop the red onion and herbs. Slice the olives.
Place everything in a large mixing bowl.
Rinse the chickpeas: Drain and rinse the chickpeas under cold water. Pat them dry with a clean towel to remove excess moisture, then add to the bowl.
Make the dressing: In a small bowl or jar, whisk together olive oil, lemon juice, red wine vinegar, garlic, oregano, salt, and pepper. Taste and adjust the acidity or seasoning as needed.
Toss the salad: Pour the dressing over the chickpea mixture and toss gently until everything is well coated.
Fold in the herbs and olives.
Add feta (if using): Sprinkle feta over the top and gently toss again. Taste and season with a pinch more salt, pepper, or lemon if needed.
Rest, then serve: Let the salad sit for 10 to 15 minutes so the flavors meld. Serve chilled or at room temperature.