1. Start by pounding the chicken breasts to even thickness. This helps them cook more uniformly in the slow cooker.
2. Place one slice of ham and one slice of Swiss cheese on each chicken breast, then roll them up and secure with toothpicks if needed.
3. Arrange the rolled chicken breasts in the bottom of your slow cooker.
4. In a medium bowl, mix together the condensed cream of chicken soup and milk until smooth. Pour this mixture over the chicken rolls.
5. In a separate bowl, combine the seasoned breadcrumbs and melted butter. Sprinkle this mixture over the top of the chicken and sauce.
6. Cover the slow cooker and cook on low for 4-5 hours, or until the chicken is fully cooked and tender.
7. Before serving, remove toothpicks and season with a bit of salt and pepper if needed.
