Wash and prepare all the vegetables. Chop the lettuce, slice the cucumber, halve the cherry tomatoes, and finely chop the red onion.
Place the shredded cooked chicken breast into a large mixing bowl. Add the lettuce, cucumber, cherry tomatoes, and red onion.
In a small bowl, combine the Greek yogurt, olive oil, lemon juice, salt, and black pepper. Mix well until smooth and creamy.
Pour the dressing over the chicken and vegetables. Gently toss everything together until all the ingredients are evenly coated.
Taste the salad and add a little more salt or black pepper if needed.
Transfer the salad to a serving bowl or plate. Serve immediately and enjoy your healthy protein-packed chicken salad.