Craving comfort food but cooking for one? Chef John’s Chicken Cordon Bleu Casserole is the perfect single-serving twist on the classic dish! This easy, creamy, cheesy, and crispy casserole has all the flavors of traditional chicken cordon bleu—juicy chicken, savory ham, melted Swiss cheese, and a golden breadcrumb topping—all in a convenient, no-fuss one-pan meal.