Unroll the pizza dough and place on a baking tray with baking paper. Spread tomato sauce on top and spread. Bake the dough in a preheated oven (electric cooker: 225 °C/ convection oven: 200 °C/ gas: see manufacturer) for 15-20 minutes. Peel and finely dice the onions. Clean, wash and sort the spinach. Heat oil in a large, wide pot, add onions and sauté. Add the spinach, let it collapse, season with salt, pepper and nutmeg.
Wash and halve the tomatoes. Stir cream cheese until smooth and fill into a piping bag. Take out the pizza, cover with sliced pork, spread spinach evenly on top. Spray a field of cream cheese onto the pizza. Spread 11 tomato halves on each and serve immediately. Add the remaining tomato halves.