Weigh the warm water in a glass measuring cup and add the coconut sugar and psyllium husks. Stir well to combine. Set aside while you weigh the dry ingredients.
260 g warm water, 23 g psyllium husks, 30 g coconut sugar
To a medium bowl, add buckwheat flour, tapioca flour, almond flour, and quinoa flour. Whisk to combine.
100 g buckwheat flour, 70 g tapioca flour, 30 g almond flour, 30 g quinoa flour
To a large mixing bowl, or bowl of a stand mixer, add the active gluten-free sourdough starter and avocado oil. Then add the psyllium/honey mixture. Whisk well to combine.
206 g active gluten-free sourdough starter, 30 g avocado oil
Add the dry ingredients to the wet ingredients. Use a dough whisk to form a shaggy dough.
Use a stand mixer fitted with the paddle attachment or your hands, to mix the dough until no dry flour remains.
Cover the bowl and let sit or "autolyse" for 20 minutes.
Uncover the bowl and add the salt and fresh thyme. Mix again until the salt and thyme are fully incorporated.
7 g salt, 2 g chopped fresh thyme
Turn the dough out onto a counter that has been lightly floured with white rice flour. Gently knead until you get a smooth ball.
Place the dough into a floured 7 inch banneton and cover with a shower cap or place into a large zip-lock bag.
Let the dough sit at room temperature for 1 hour and then place it in the refrigerator for 18-48 hours.
When you are ready to bake, take the dough out of the refrigerator and let it warm up at room temperature a bit while you pre-heat the oven. Pre-heat your oven to 500 degrees F with a Dutch oven inside. Set a timer for 1 hour.
Turn the dough out onto a piece of parchment paper and score as desired.
Carefully place the dough (still on parchment paper) into the Dutch oven and cover. Reduce the oven to 450 degrees F and bake covered for 25 minutes.
Uncover and reduce the oven to 400 degrees F and bake for 35 minutes.
Reduce the oven temperature once more to 350 degrees F and bake for an additional 20 minutes.
Let cool on a wire rack for at least 4 hours, overnight is best.