Preheat oven to 350°F. Spray inside of a 2 1/2-quart casserole dish or 8 x 12-inch Pyrex dish with cooking spray; set aside.
In a large mixing bowl, mix together stuffing mix and melted butter or margarine; measure 1/2 cup of stuffing mix and set aside for topping. Add to the remaining stuffing mix the rest of the ingredients, stirring and mixing well. Pour entire mixture into prepared casserole or Pyrex dish. Sprinkle reserved 1/2 cup stuffing mix over casserole.
Bake, covered, for 30 minutes then uncover for about 15 minutes or until golden brown and bubbly.