To a medium bowl add the water, oil and syrup. immediately stir in the whole psyllium husk and the flax seed. If using psyllium husk powder, add this to the flour blend for the easiest mix in without forming lumps.
Add the 410 grams of levain from the previous night to the wet mix and combine all the ingredients well.
Stir in the flours and with slightly wet hands, or a stand mixer with a dough hook. Mix everything well until there is no loose flour. There are no stretch and folds.
Rest the dough for 15-20 minutes and then knead the dough on a floured surface with white rice flour.
Shape the dough and put it into a banneton to rise, or place the dough into a parchment lined loaf pan.
Proof the dough for 2-3 hours in a warm place and then place it into the fridge for 30 to 40 minutes before scoring and baking.
Bake in a preheated, Dutch Oven with the lid on at 450°F (230°C) for 35 minutes, then at 400°F (200°C) 30 - 35 minutes.
When the bread is fully baked, it will sound hollow when tapped on the bottom and It will be firm to the touch.
Slice when cool to prevent gumminess and store on the counter for 2-3 days before slicing and freezing the remainder of the bread.