Preheat your oven to 350°F (175°C).
In a large bowl, **mix** together the shredded chicken, cream of chicken soup, mayonnaise, sour cream, and Dijon mustard.
4 cups cooked chicken, shredded, 1 (10.75-ounce) can condensed cream of chicken soup, 1/2 cup mayonnaise, 1/4 cup sour cream, 1/4 cup Dijon mustard
**Stir** in the diced ham and 1/2 cup of the shredded Swiss cheese.
1 cup cooked ham, diced, 1 cup shredded Swiss cheese
**Pour** the mixture into a greased 9x13 inch baking dish.
In a separate small bowl, **combine** the crushed croutons and melted butter.
1 cup seasoned croutons, crushed, 2 tablespoons butter, melted
**Sprinkle** the crouton mixture evenly over the casserole.
1 cup seasoned croutons, crushed, 2 tablespoons butter, melted
**Top** with the remaining 1/2 cup of Swiss cheese.
1 cup shredded Swiss cheese
**Bake** for 25-30 minutes, or until golden brown and bubbly.
Let it **cool** for a few minutes before serving.
**Serve** hot and enjoy!
