Prepare the Ingredients: Gather all the ingredients listed above and prepare them as described.
Combine Chicken and Vegetables: In a large bowl, combine the diced chicken, cucumber, cherry tomatoes, avocado, and red onion.
Make the Dressing: In a separate bowl, whisk together the olive oil, lemon juice, salt, and pepper until combined.
Dress the Salad: Pour the dressing over the salad ingredients and gently toss everything together until well-coated.
Serve and Enjoy: Garnish with fresh parsley and serve immediately for the best flavor!