Prepare the crust first, combining the flours, salt, sugar, and xanthan gum.
Cut in the butter and shortening until the mixture is sand-like.
Add in the water 1 tablespoon at a time, until the dough clumps together.
Roll the dough into a ball and refrigerate for 45 minutes to an hour.
Preheat the oven to 375 degrees.
While the dough is chilling, peel and cut up the apples.
Add lemon juice and brown sugar to apples.
Cover a cookie sheet with foil and spray with cooking spray.
Once dough is chilled, roll it out to about 1 cm thickness on a well-floured surface (remember to use gluten free flour).
Cut out circles of dough (I used a 4 inch wide plastic lid)
As you work with the dough & keep your rolling board & pin well-floured, you may need to add a little cold water to the dough to keep it from getting crumbly.
Spoon 1-2 tablespoons of the apple mixture onto one half of each dough circle.
Fold over the dough and press closed with your fingers or a fork.
Bake for 15-20 minutes, or until dough is golden brown.
Let the turnovers cool for a few minutes while you mix up the glaze.