1. In a large bowl combine yeast, sugar, salt, water, olive oil, and flour. Cover the bowl with a towel and let stand at room temp for 40 to 50 minutes or until almost doubled in size.
2. Turn dough out onto a well floured surface and shape into a ball. Cover and let stand for 20 minutes.
3. Roll dough out to a circle. Transfer dough to a lined oven tray. Top as desired.
4. Bake in a 250°C for 11 to 14 minutes or until cheese is melted and crust starts to brown.