Lightly season chicken breast with salt, pepper or garlic salt (Your favorite seasoning)
Heat skillet to medium high heat. Add in butter. Place chicken in and saute in skillet, or crock pot if it has the feature, until browned - approximately 3 minutes on each side.
Pour cream of chicken and wine into skillet and warm.
Place chicken in crop pot and pour soup and wine mixture over the chicken. Pour in mushrooms. Place lid on tip and cook on low for 4 to 5 hours. You do not want to overcook the chicken.
30 minutes before chicken is done. Remove 1/2 cup of the juice from the crock pot. Stir in 2 tablespoons of corn starch. Pour back into crock pot and sir around. Place a slice of muenster cheese on each chicken breast. Return lid. Cook for 30 minutes until the cheese has melted.