Spread the pizza dough with the baking paper on a baking tray and spread with the tomato paste
Wash and clean the zucchini and eggplants, cut lengthwise and remove the seeds. Cut the peppers into quarters, clean, wash and cut them into even small cubes. Heat olive oil in a pot. Fry the vegetables for about 5 minutes while turning them until transparent. Season with salt, pepper and paprika powder. Wash the oregano, pluck the leaves from the stalks, chop roughly and add to the vegetables. Remove the pot from the stove and let it cool down slightly. In the meantime, cut the mozzarella into cubes
Spread the vegetables on the dough, leaving a rim of approx. 4 cm all around, and add the mozzarella cubes. Roll up the dough from the long side and form a wreath. Bake in the preheated oven (electric cooker: 225 °C/ convection oven: 200 °C/ gas: see manufacturer) for 20-25 minutes