Skillet Caprese Chicken Casserole for Two

Name: Skillet Caprese Chicken Casserole for Two
Cook time: 40 min
Total time: 40 min
Cuisine: European, Italian, Mediterranean
Ingredients: 4 ounces whole-wheat penne or rotini; 8 ounces boneless, skinless chicken breasts, trimmed and cut into bite-size pieces; 0.5 pint grape tomatoes, halved; 4 tablespoons chopped fresh basil, divided; 1 cup plus 2 tablespoons low-sodium chicken broth; 0.5 cup reduced-fat milk; 0.25 cup reduced-fat sour cream; 1.5 tablespoons all-purpose flour; 0.5 teaspoon onion powder; 0.5 teaspoon dry mustard; 0.125 teaspoon salt; 0.125 teaspoon ground pepper; 0.5 cup shredded mozzarella cheese; Good-quality balsamic vinegar (optional)