Combine yeast, and water in a small bowl, stir until dissolved

Place flour and salt in a mix master bowl fitted with a dough hook. Add yeast mixture and mix on low speed until dough is smooth

Place dough ball into a lightly oiled bowl, cover with cling wrap. Set aside in a warm drought free place for 30 minutes or until dough has doubled in size. Turn dough out on a floured surface and knock back (punch) the dough to remove excess air, lightly knead

Heat 1 tablespoon oil in a frying pan and add onion. Saute for 3-4 minutes or until soft. Season with salt. Set aside

Turn FUNCTION dial to PIZZA setting. Turn TIME dial to 15 minutes. Turn TEMPERATURE dial to 210°C CONVECTION. Press the START button

Divide dough into four balls. Roll out one piece of pizza dough to form a 24-26cm disc and place onto pizza tray. Prick base with a fork or pizza docker

Divide ingredients into four. Spoon a quarter of the cooked onion over pizza base and top with a quarter of the sweet potato, prosciutto, goats cheese and thyme leaves. Season with salt and drizzle with olive oil

When preheating has completed, place pizza into the oven for 15 minutes. Remove from the oven and garnish with extra thyme leaves. Cut into wedges and serve immediately

Repeat with remaining dough and toppings