In medium-sized saucepan, place pears with water, monk fruit sweetener, and gingerroot. Split section of vanilla bean lengthwise, scrape out seeds, and drop seeds and pod into saucepan. Bring mixture to a boil over medium-high heat. Reduce heat to medium, whisk in xanthan gum, and simmer slowly for 10 to 15 minutes, or until pears are tender. Turn off heat and allow liquid to cool completely.