Cut chicken into strips about 2-inches long and 1/2-inch thick. Place in crockpot with salt, ginger, celery, water chestnuts, onions, bouillon, and soy sauce. Cover and cook on Low 5 to 6 hours. Turn control to High. Add mushrooms and bean sprouts. Cover and cook on High 15 minutes. Serve over hot rice. Sprinkle with almonds. Serve with extra soy sauce, if desired.