In a bowl, combine the water with the psyllium husk powder and whisk well. It will gel instantly and become thick. Set aside for 20-30 minutes.
Meanwhile, measure/weigh all the dry ingredients and add them to a large bowl. Preheat the oven to 390 °F (200 °C).
Add the psyllium gel to the bowl and knead the ingredients with a hand/stand mixer (use a dough hook). You can also knead the dough with your hands. It will take about 5-10 minutes for the dough to come together.
If the dough appears too wet, sprinkle it with 1-2 Tbsp tapioca flour. If it feels too dry, add a little water.
Shape the dough into a round or rectangular loaf and place it on a baking sheet lined with parchment paper.
Bake for 50-60 minutes. Let the bread cool completely, then slice and enjoy.
