Preheat the oven to 200C and line a large baking tray with baking paper.
Use your hands to rub the butter into the flour to form a fine crumb. Then slowly add the milk using either for hands or a smooth edge of a butter knife to bring it together to form a soft dough. Dust a little extra flour onto your clean bench and then tip the dough out.
Knead the dough for 5min until it comes together in a smooth ball. Use a floured rolling pin to roll it out to 20cm x 30cm. The dough should be between 3-5mm thick.
Spread the dough with pizza sauce. Then layer on the salami, red onion, capsicum, black olives and ¾ of the cheese.
Roll up like a swiss roll and then slice into 8-10 scrolls.
Place the scrolls flat on a lined baking tray 3 cm apart and sprinkle with remaining cheese. Bake for 15min or until golden brown.