01 -
Preheat oven to 350 degrees F. Coat a 9×13-inch baking dish with nonstick cooking spray and set aside.
02 -
In a large bowl, whisk together the cream of chicken soup, cream of mushroom soup, sour cream, melted butter, chicken broth, salt, pepper, and garlic powder until fully combined.
03 -
Stir in the frozen peas, cooked chicken, and cooked spaghetti. Toss the mixture to ensure everything is evenly coated.
04 -
Pour the mixture into the prepared baking dish and sprinkle with the mozzarella cheese, cheddar cheese, and Parmesan cheese.
05 -
Cover the dish with foil and bake for 30 minutes. Remove the foil and bake for an additional 15 minutes until the cheese is melted and the casserole is heated through.
06 -
Remove the dish from the oven and garnish with chopped parsley. Allow the casserole to rest for 5-10 minutes before serving.