- cooking spray
- 1 (12 ounce) package rotini pasta
- 2 tablespoons butter
- 2 onions, chopped
- 2 stalks celery, finely chopped
- 1/2 cup finely chopped red bell pepper
- 2 1/4 cups milk
- 1 (10.75 ounce) can cream of mushroom soup
- 1/2 teaspoon poultry seasoning
- 1/4 teaspoon salt
- 1/8 teaspoon ground black pepper
- 1 rotisserie chicken, meat removed and chopped
- 1 cup shredded Cheddar cheese, divided
- Preheat oven to 350 degrees F (175 degrees C). Prepare a 13×9-inch baking dish with nonstick cooking spray.
- Bring a large pot of lightly salted water to a boil. Cook the rotini at a boil until tender yet firm to the bite, about 8 minutes; drain. Pour rotini into prepared baking dish.
- Melt butter in a heavy saucepan over medium heat. Cook and stir onions, celery, and bell pepper in melted butter until softened, about 5 minutes.
- Stir milk, cream of mushroom soup, poultry seasoning, salt, and black pepper into the onion mixture. Reduce heat to medium-low and bring to a simmer; about 5 minutes. Add chicken and 1/2 cup Cheddar cheese to the milk mixture; remove immediately from heat and pour over the rotini. Top pasta and sauce mixture with remaining Cheddar cheese.
- Bake in preheated oven until cheese is melted and beginning to brown, about 25 minutes.