In a large salad bowl, combine chopped romaine lettuce, cooked chicken, cherry tomatoes, cucumber, feta cheese, black olives, red onion, and green bell pepper.
In a small bowl, whisk together olive oil, lemon juice, red wine vinegar, minced garlic, dried oregano, salt, and pepper.
Pour the vinaigrette over the salad and toss gently until well combined.
Serve immediately or refrigerate any uneaten portions.
Notes
This salad is perfect for warm weather and can be customized by adding avocado or toasted pita chips for extra texture.