For an extra moist chicken, marinate in buttermilk for at least 2 hours.
Preheat oven to 375 degrees F. Coat a 7x11 inch baking dish with nonstick cooking spray.
Butterfly the chicken breasts by cutting them lengthwise almost all the way through. Pound the open chicken breasts to 1/4 inch thickness.
Combine all the spices, sour cream and cream cheese in a small mixing bowl and whip with a hand mixer.
Spread the soft cheese mixture evenly along the open breasts, then top with a cheese slice and a ham slice. Roll up each breast, and secure with a toothpick. Grind a thin layer of salt and pepper on top, and roll in bread crumbs if desired. Place in baking dish.
Bake for 50 to 60 minutes, or until chicken is no longer pink. Remove from oven, and place 1/2 cheese slice on top of each breast. Return to oven for 3 to 5 minutes, or until cheese has melted. Remove toothpicks, and serve immediately.