This is what I made the day after Thanksgiving with the left overs. I had mashed potatoes and gravy and some stuffing so I placed them in a foil pan and baked them.
I layered the mashed potatoes first then the gravy and then the stuffing and some gravy again. Then I topped it with shredded cheddar cheese that I had and baked it at 400 degrees for about 20 to 25 minutes or until the cheese is melted. I served it with oven roast.