Add chicken, onions, and red bell peppers to the bottom of the crock-pot.
In a small bowl, add all sauce ingredients and blend well. Pour over chicken and vegetables. Be sure everything is coated well.
Cook on low heat for 4 hours or on high heat for 2 hours. Once done, remove chicken, cool slightly, and shred or dice into small pieces.
Just before serving: Add cabbage to a large bowl and steam in microwave for 2-3 minutes, until soft.
To serve: Place about 1½ cups steamed cabbage on each plate. Top with 1 cup chicken including sauce.
Freeze any leftovers, if desired. Add cabbage, chicken, and sauce to individual containers and freeze.