Step 1

In a large bowl, combine the water, ketchup, brown sugar, orange juice concentrate, soy sauce, mustard, salt, garlic powder, ginger and pepper. Pour half into another large bowl or dish; add chicken and turn to coat. Refrigerate for 8 hours or overnight. Cover and refrigerate remaining marinade.

Step 2

Drain and discard marinade from chicken. Place chicken in a 4 or 5-qt. slow cooker; add reserved marinade. Cover and cook on low for 7-8 hours or until chicken juices run clear.

Step 3

Remove meat to a serving platter; keep warm. Skim fat from cooking juices; transfer to a small saucepan. Bring liquid to a boil. Combine cornstarch and water until smooth. Gradually stir into the saucepan. Bring to a boil; cook and stir for 2 minutes or until thickened. Stir in the oranges, green pepper and olives if desired. Serve with chicken and rice.