1. Place lettuce and tomato on one slice of bread.
2. Top with chicken, onion and cheese.
3. Drizzle vinaigrette over cheese. Cover with second slice of bread. Cut in half and serve.
Nutritional information per serving: Calories 523; Total Fat 14g; Saturated Fat 5g; Tran Fat 0; Cholesterol 73mg; Sodium 1757mg; Total Carbohydrate 64g; Dietary Fiber 5g; Total Sugars 12g; Protein 42g