Preheat oven to 425°F and line a baking sheet with a piece of parchment paper. Or use a pizza stone or pizza pan.
In a large bowl, combine the dry ingredients (cassava flour, tapioca flour or arrowroot starch), sea salt, and garlic powder).
In a separate bowl stir together the egg, olive oil, and warm water.
Add the wet ingredients to the dry ingredients and mix until a sticky dough forms. Let the pizza dough rest for 10 minutes at room temperature.
Sprinkle a few tablespoons of tapioca starch or flour onto the lined pan. Use flour-dusted hands to handle the dough and shape it into a ball, then flatten it until it’s about 1/2 inch thick.
Lightly brush olive oil over the crust and prebake the crust for 12-15 minutes.
Remove from oven and add your desired toppings and sauce.
Return the pizza to the oven and bake for another 10-12 minutes or until the cheese is melted and crust is crispy.