PLACE the potato on a paper lined baking tray and spray with oil. Bake in a hot oven 200°C for 20-25 minutes or until just tender.
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 to make a rough 20 x 30 cm rectangle and place on a large, lightly floured baking tray. Spread with VEGEMITE and then top with kumera, rosemary and cheese. Bake in a hot oven 200°C for 10-15 minutes or until cooked through. Serve immediately.