Creamy Chicken Florentine Casserole

Name: Creamy Chicken Florentine Casserole
Ingredients: 8 ounces whole-wheat rotini or penne (about 2¾ cups); 2 tablespoons extra-virgin olive oil; ½ cup chopped shallots (2 small); 1 tablespoon minced garlic; ⅔ cup dry white wine; 2½ cups unsalted chicken broth; 3 tablespoons all-purpose flour; 4 ounces reduced-fat cream cheese , softened; 1 ( 10 - ounce ) package baby spinach; 4 cups shredded cooked chicken; 6 tablespoons grated Parmesan cheese , divided; ¼ teaspoon salt , divided; Chopped fresh flat-leaf parsley for garnish (optional)