Take the dough out of the fridge. Drain the tomatoes well and cut them into small pieces. Wash the rosemary, dab dry, remove the needles and chop coarsely.
Preheat oven (electric cooker: 225 °C/circulating air: 200 °C/gas: see manufacturer). Line a baking tray with baking paper. Unroll the puff pastry. Place cheese slices next to each other on top. Spread tomatoes on top.
Sprinkle with rosemary and season with pepper.
Roll everything up from the long side. Cut the dough roll with a sharp knife into approx. 12 slices. Place one cut side of each slice on the baking tray. Bake in a hot oven for about 15 minutes.
Serve hot or cold.