Preheat oven to 375 degrees. In large mixing bowl, cream butter and sugar until blended. Add egg and mix until blended. Add sweet potato, yogurt, and vanilla and blend. Add baking soda, salt, xanthan gum, oats, and mesquite flour and mix until all ingredients are well blended. Add chocolate chips and mix until incorporated. Let sit for 30 minutes. Spoon dough onto a clay baking stone or cookie sheet. Bake for 12 to 15 minutes or until lightly browned.