Combine yeast, sugar, salt, water and oil in a bowl and whisk to combine. Cover and set aside for 10 minutes until bubbles start to appear on surface. Transfer the mixture to a large bowl, add the flour and bring together in the bowl with your hands.
Turn the dough onto a lightly floured surface and knead until smooth and elastic. Place into a bowl, cover and stand in a warm place until it doubles in size. This takes about an hour depending on the weather.
Place pizza stone (or oven tray) into the oven and preheat oven and stone to 250C (480F) fan-forced for about 30 minutes.
Knock the dough down. Using ¼ of the dough for 1 pizza, knead on a floured surface until smooth then roll out until 5mm thick. Place the dough onto the very hot pizza stone (I lightly flour the stone first to stop the dough sticking).
Spoon over about 2 tbs tomato paste and add any toppings you like. I like to finish with a sprinkle of oregano.
Cook 6-8 minutes or until base is golden and crisp.