Chicken Spaghetti Casserole

Ingredients

• 2 cups chopped cooked chicken breast
• 2 cups uncooked spaghetti noodles, broken into 2-inch pieces (about 7 ounces)
• 1 cup (1/4-inch-thick) slices celery
• 1 cup chopped red bell pepper
• 1 cup chopped onion
• 1 cup fat-free, less-sodium chicken broth
• 1/2 teaspoon salt
• 1/4 teaspoon freshly ground black pepper
• 2 (10.75-ounce) cans condensed 30% reduced-sodium 98% fat-free cream of mushroom soup
• Cooking spray
• 1 cup (4 ounces) shredded cheddar cheese, divided