In a mixing bowl, whisk together honey, soy sauce and vinegar. Add ginger, garlic, onion and pepper. Whisk well. Pour the mixture over chicken. Cover slow cooker. Cook on LOW for 6 hours or on HIGH for 4 hours.
When done, DO NOT turn off the slow cooker. Shred chicken with two forks.
In a small measuring cup, whisk cornstarch with cold water. Add to slow cooker and stir. Let cook for 10 minutes and stir again. The mixture should thicken.
Serve over rice with a side of steamed vegetables.
Notes
You can use ⅓ cup of honey in place of brown sugar.