Chicken Florentine Casserole

2 cups elbow macaroni
3 cups shredded cooked chicken
1 can (10-3/4 ounces) condensed cream of mushroom soup, undiluted
2 cups shredded Swiss cheese
1 package (10 ounces) frozen creamed spinach, thawed
1/2 cup mayonnaise
1/4 cup loosely packed minced fresh basil
1 teaspoon garlic powder
1/2 teaspoon dried thyme
1/2 teaspoon pepper
1/2 cup seasoned bread crumbs
2 tablespoons butter, melted

Preheat oven to 350°. Cook macaroni according to package directions.
Meanwhile, in a large bowl, combine chicken, soup, cheese, spinach, mayonnaise, basil, garlic powder, thyme and pepper.
Drain macaroni; gently stir into chicken mixture. Transfer to an ungreased 2-1/2-qt. baking dish. Toss bread crumbs and butter; sprinkle over casserole.
Bake, uncovered, until bubbly, 40-45 minutes.