Spray slow cooker with cooking spray.
Chop apples and onion. Place in slow cooker.
Add raisins and chicken broth.
Set chicken on top of apple mixture.
In a separate bowl, combine mustard, brown sugar, garlic powder, onion powder, pepper and salt.
Spread mixture over chicken.
Cover and cook on high in slow cooker for 2 ½ - 3 hours or 5-6 hours on low.
Using two forks, shred chicken into large chunks. Stir to combine.
Serve over cooked rice or egg noodles.