Chopped Greek Salad with Chicken

Name: Chopped Greek Salad with Chicken
Ingredients: ⅓ cup red-wine vinegar; 2 tablespoons extra-virgin olive oil; 1 tablespoon chopped fresh dill, or oregano or 1 teaspoon dried; 1 teaspoon garlic powder; ¼ teaspoon salt; ¼ teaspoon freshly ground pepper; 6 cups chopped romaine lettuce; 2 1/2 cups chopped cooked chicken, (about 12 ounces; see Tip); 2 medium tomatoes, chopped; 1 medium cucumber, peeled, seeded and chopped; ½ cup finely chopped red onion; ½ cup sliced ripe black olives; ½ cup crumbled feta cheese