Combine the first five dry spices in a small bowl and spread over chicken on both sides.
Pour olive oil and garlic on the bottom of the crock pot. Pour in 1/4 cup balsamic vinegar
Place chicken on top.
Sprinkle remaining balsamic vinegar over the chicken
Cover and cook on high for 3 hours if you have a fairly new slow cooker. If you have an older slow cooker you may need to cook another hour.
Sprinkle with fresh parsley on top to serve.