Place squash and sweet potatoes and leeks in the slow cooker. Season chicken all over with salt and black pepper and place on top of vegetables in slow cooker. In a medium bowl, combine orange marmalade and remaining ingredients. Pour mixture over chicken and vegetables. Cover and cook on LOW for 6 to 8 hours or on HIGH for 3 to 4 hours.
Serve 4 of the chicken breast halves with squash and potatoes on the side and extra sauce spooned over top (reserve remaining chicken for pizza). Top with parsley and rosemary just before serving.
Copyright 2006, Robin Miller, All Rights Reserved