Season chicken with salt and pepper. Spray a pan with cooking spray over medium heat and sear chicken on both sides.
Add 4 tbsp. chicken broth and simmer until cooked through. Approx. 5 minutes (will vary depending on the thickness of your chicken).
Mix Dijon, milk, horseradish and chicken broth together in a bowl. Add Dijon cream sauce to the pan with the chicken and simmer for a few minutes. Cover chicken with cream sauce, top with 1 slice of ham and 1 slice of swiss cheese. Cover and cook until the cheese is melted.Serve with additional creamy Dijon sauce on top.
Notes
Always slice chicken against the grain for the most tender and juicy chicken.