Add the yeast, sugar and warm water to a glass bowl, stir to combine and then cover with clingfilm to rest for 5 minutes, until foamy
To the bowl of a stand mixer, add in the flour, semolina, oil and salt. Add in the yeast solution and mix together using the dough hook attachment on a low speed.
Increase the speed and knead the dough for 5 minutes, until soft and elastic.
Place the dough in a large, oiled bowl and cover with cling wrap or a tea towel to prevent drying out.
Find a warm dry place and leave the dough there to proof (rise up) for 1-2 hours, until doubled in size.
Divide the dough into 2-4 balls and roll each ball on a lightly floured surface to the desired thickness.
Prepare your pizza and bake for 16 minutes at 220 °C