SIFT together the flour, yeast, salt and sugar. Add the water and oil and stir to make dough. Turn onto a lightly floured surface and knead until smooth and elastic. Place dough in an oiled bowl and cover with plastic wrap. Stand in a warm place for 30 minutes or until doubled in size.
ROLL out dough on a floured surface and place on a 26cm large, lightly floured pizza tray. Spread with VEGEMITE and top with chicken, pineapple and cheese. Bake in a hot oven 200°C for 10-15 minutes or until cooked through. Toss over the spring onions and drizzle with sweet chilli sauce. Serve immediately.