Mix all the dry ingredients together in a large bowl and stir well.
Add the water slowly to see how much you need and mix well with a spoon or spatula. The dough should be quite thick. If it is too dry add a touch more water to reach the desired consistency.
Transfer to a lined 2lb loaf tin and flatten the surface with the back of a wet spoon.
Sprinkle with extra sesame seeds.
Leave to sit for around 30-60 minutes to allow the psyllium husk and chia seeds to bind the dough together.
Preheat the oven to 185°C fan.
Bake the loaf in the oven for 1 hour, testing with a skewer before removing from the oven.
Allow to cool completely before slicing.
