Place chicken in crock pot.
Mix sauce ingredients in a small bowl and pour over chicken. Cover and cook on low 3-5 hours or high 2-4 hours.
Add the pineapple chunks and the bell peppers and cook an additional 2 hours on low, 1 hour on high, or until chicken is cooked through.
Mix the cornstarch and water in a small bowl. Turn the cooker to HIGH and stir in the cornstarch/water mixture. Stir until juice begins to thicken. Cook for 15 additional minutes.
Serve over rice.
