Season the flattened chicken breasts with salt and pepper.
Place 1 slice of cheese on top of each breast and top with a slice of prosciutto.
Roll up, beginning with the narrow end, and secure with a toothpick.
Place in a greased baking dish.
Combine the remaining ingredients in a saucepan and sir over low heat until the ingredients
Pour over the chicken and bake uncovered in a preheated 350F (180C) oven, basting with the sauce several times, until the chicken is cooked through, about 40 minutes.
Remove the toothpicks before serving. Serves