1.Preheat oven to very hot, 220°C (200°C fan-forced) Lightly grease an oven tray.
2.Sift flour and salt together into a bowl. Add butter. Rub in lightly using fingertips.
3.Make a well in the centre of flour mixture. Pour in combined milk and water, reserving about 1 tablespoon. Using a bread and butter knife, mix quickly to a soft, sticky dough. Do not over-mix.
4.Turn onto a lightly floured surface. Knead gently. Halve dough and press or roll out to form 2 rectangles about 1cm thick. Spread vegemite over each and sprinkle with cheese, pressing slightly.
5.Roll up each piece to form a log. Cut into 2cm thick slices. Arrange close together, cut side up, on tray. Brush with reserved milk mixture. Sprinkle with extra grated cheese.
6.Bake for 15-20 minutes, until scrolls sound hollow when tapped. Cool on a wire rack. Serve warm or cold.