Mix 500 g flour, 1 heaped teaspoon salt and 1 level tablespoon sugar in a large bowl. Dissolve yeast in 330 ml lukewarm water. Pour into the flour and knead everything into a smooth dough using the dough hooks of the mixer.
Cover and leave to rise in a warm place for about 1 hour.
Knead the dough again and divide into three. Roll out a third of the dough on some flour to a rectangle (approx. 22 x 38 cm).
Spread the dough plate with 1⁄3 tomato paste and sprinkle with 1⁄3 cheese. Cover dough plate with 8 salami slices and cut into 8 rectangles. Put 4 pieces of dough on top of each other. Place the dough packs upright in a greased box form (25 cm long; 1.5 l capacity).
Process the remaining dough and other ingredients in the same way and place in the mould. Drizzle with oil.
Bake in the preheated oven (electric oven: 200 °C/circulating air: 175 °C/gas: see manufacturer) for 45-50 minutes. Cover with aluminium foil after about 15 minutes.