Lightly oil a 9x9 square baking pan (I use avocado oil).

Mix the psyllium husk and water. Let this mixture thicken while you combine the dry ingredients.

In a separate bowl, mix the starches, flours, and salt.

Add the sourdough starter to the psyllium husk and water mixture. Whisk to combine.

Add the wet dough (psyllium, water, sourdough starter) to the flour mixture.

Mix into dough. I use a dough whisk. You can use a large spoon or a stand mixer.

Press into the 9x9 baking pan.

Let rise for 3-5 hours.

Preheat the oven to 425F about an hour before baking.

Before putting the dough into the oven, drizzle with olive oil, a sprinkle of sea salt, and any herbs you enjoy like rosemary. 

Bake for 40-45 minutes.

Let cool for 20-30 minutes. Enjoy immediately or place on a wire baking rack to cool completely.