Fill a small glass bowl with 200g of warm water (between 100-115 F / 38-46C).
Stir in the dried yeast and sugar with a wooden spoon. Allow to rest for 10 minutes for the yeast to activate. It should become very frothy and bubbly.
Add the psyllium husk to the bowl of a stand mixer (or a large mixing bowl). Stir in 150g water until combined and allow to rest for 3-4 minutes. It should form a thick gel.
Pour the olive oil into the gelled psyllium husk, followed by the flours, baking powder, salt and them finally the forthy yeast with all its accompanying water.
Attach the paddle beater and mix the dough for about 5 minutes until it comes together. It should still be a little sticky as you remove it from the mixer.
Roll the dough into an even ball on a clean dry surface where you should smooth out its stickiness.
Place the dough ball in a glass bowl brushed with olive oil and roll the dough around to coat in the olive oil. Cover the bowl with plastic wrap and set to prove in a warm damp environment for 2 hours. It should rise and almost double in size.
Pre-heat the oven to 240C / 220C fan assisted oven / gas mark 8.
Remove the dough from the bowl and split into half, rolling into two balls. Save one of the dough balls for later (see notes below on how you can store this dough if you are not going to be baking a second pizza straight away).
Roll out the first dough ball onto a smooth clean work surface with a rolling pin into a 12 inch round. Then curl the edges of the dough back towards the centre of the circle to create a lip. This will neaten up your dough round and handily provides a great thick outer crust.
Sprinkle cornmeal over the base of your pizza pan and transfer the pizza dough (with the aid of your rolling pin) to lay on top. Brush the lip of the dough with olive oil.
Par-bake your pizza crust by taking a sheet of aluminium foil (or piece of parchment paper). Fold up the edges to make a round foil basket, about the size of your pizza crust (using 2 crossed pieces of foil if they are not wide enough) and then place lightly on top of the pizza dough. Fill with baking beans. Bake the pizza crust for 7 minutes.
Remove the pizza crust from the oven and remove the foil and baking beans.
Brush the surface of the pizza dough with olive oil then add your toppings.
Place the pizza back in the oven for 10 minutes.
Serve immediately.