Preheat oven to 350 degrees. Grease a baking dish with butter and set aside.
Press stuffing into bottom of prepared baking dish.
In a skillet, over medium high heat, saute onion and celery in butter and stir in flour until well mixed. Gradually stir in evaporated milk over low heat until sauce thickens.
Stir in remaining ingredients and mix well. Spoon on top of stuffing and bake for 25 to 30 minutes in preheated oven. Makes 4 servings. Enjoy!