Thanksgiving Leftover Casserole

Name: Thanksgiving Leftover Casserole
Prep time: 15 min
Total time: 15 min
Cuisine: American
Ingredients: Salted butter, for the baking dish; 4 c. leftover stuffing; 4 c. chopped skinless leftover turkey (or use rotisserie chicken); 1 1/2 c. coarsely chopped leftover green beans; 1 1/2 c. leftover gravy; 3 c. leftover mashed potatoes; 1 large egg yolk; 1 c. shredded monterey jack cheese (about 2 oz.); Cranberry sauce, for serving