Chicken turns this Greek-inspired salad into a substantial main course. Feel free to substitute other chopped fresh vegetables, such as broccoli or bell peppers, for the tomatoes or cucumber. Use leftover chicken, store-roasted chicken or quickly poach a couple boneless, skinless chicken breasts while you prepare the rest of the salad. Serve with pita bread and hummus.
Whisk vinegar, oil, dill (or oregano), garlic powder, salt and pepper in a large bowl. Add lettuce, chicken, tomatoes, cucumber, onion, olives and feta; toss to coat.