Creamy Mustard Chicken

Name: Creamy Mustard Chicken
Ingredients: 1/2 package whole-wheat angel hair pasta (7-8 ounces); 4 thin-sliced chicken breasts or cutlets (about 1 pound); ½ teaspoon garlic powder; ½ teaspoon salt, divided; ½ teaspoon freshly ground pepper, divided; ¼ cup all-purpose flour; 3 tablespoons extra-virgin olive oil, divided; 1 large shallot, finely chopped; ½ cup dry white wine; ½ cup water; ¼ cup reduced-fat sour cream; 2 tablespoons Dijon mustard; 2 tablespoons chopped fresh sage, plus more for garnish