mozzarella, anchovies , oregano, oil; Pizza viennese : tomato, mozzarella, German sausage , oregano, oil; Pizza capricciosa ("capricious pizza"): mozzarella, tomato, mushrooms, artichokes , cooked ham , olives , oil (in Rome , prosciutto raw ham is used and half a hard-boiled egg is added); Pizza quattro stagioni ("four seasons pizza"):