Enjoy 1-2 cups of a low-calorie lettuce and veggies, such as Romaine or leafy greens, onion, radishes, carrots, celery, cucumbers and tomatoes (totaling 25-50 calories); 1-2 Tablespoons of low-fat cheese (25-50 calories); and 1-2 Tablespoons of low-fat or fat-free salad dressing (25-50 calories).