In SC, I would have guessed cornbread dressing. Growing up for big family get togethers (25-30) at thanksgiving and Christmas we would have mac and cheese - kid favorite. Don’t tend to do for Thanksgiving because with dressing and sweet potato casserole (which mainly just have at Thk) and then rice for picky eaters we just don’t need another starch.
My dream left overs is dressing with gravy and mustard greens, with or without leftover turkey. Could eat it every day for weeks.