Toss together everything but the parsley, and place in slow cooker.
Cook 6-8 hours on low or 3-4 hours on high.
Remove chicken to plate. Leave whole or slice.
Scrape out remaining liquid/sauce from slow cooker into a skillet. Bring to a boil and reduce liquid until slightly thickened.
Return chicken to skillet, tossing to coat then serve over rice or GF pasta.