Preheat oven to 180°C fan forced. Grease and line a large oven tray.
For the dough; combine the flour, salt and butter in a large bowl. Use your fingertips to rub butter into flour to form fine crumbs. Stir in parmesan. Make a well in the centre and add milk. Gently stir with a butter knife, until the dough comes together, adding more milk if necessary to form a soft dough.
Turn out onto a lightly floured bench and gently knead until the dough is smooth. Roll out to a 25cm x 35cm rectangle. Spread with pizza sauce, leaving a 1cm border around the edges. Top with salami, tomatoes and cheese.
Starting from one long side, roll up the dough firmly to enclose the filling. Trim ends. Cut into nine equal slices and place side-by-side on the tray. Bake for about 35-40 minutes, or until golden. Serve warm or at room temperature sprinkled with extra cheese.