Preheat the oven to 400°
Spray a 12″ round pizza pan or a baking sheet with a vegetable oil spray then sprinkle it with the corn meal.
Fill a small bowl with some cool water.
Whisk together the flours, starches salt and guar or xanthan gum in a mixing bowl.
Combine the water, yeast, oil and sugar and mix for 1 minute – you can use the measuring cup as your mixing bowl to save doing extra dishes.
Pour the liquid into the dry ingredients and mix well. It will be a sticky dough.
Drop the dough onto the center of the pizza pan or baking sheet. Dip your fingertips into the water bowl. Working from the center, gently and gradually press the dough out to the edges. You will need to continue dipping your fingers to prevent sticking.
Bake for 10 minutes. Use a fork to poke the top of the crust several times and bake for an additional 5 minutes.
Remove from the oven, load up with your favorite toppings and bake for 10-15 minutes, until the crust turns golden brown. Or you can save the crust for later. Wrap up snugly in plastic wrap and store on the counter for 1 day, the refrigerator for 2 days or frozen for several weeks. If freezing, wrap tin foil over the plastic wrap.