Clean, wash and slice the tomatoes. Peel onions and cut into thin rings. Wash sage, pluck leaves from the stems and chop finely
Remove the roll dough from the tin according to instructions. Press flat in portions on a floured baking tray. Sprinkle the dough with oil. Spread tomatoes and onions on top. Season everything with salt, pepper, sage and herbs from Provence
Bake the cakes in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C / gas: level 3) for 15-20 minutes
Slice the parmesan into thin shavings and sprinkle over the cakes before serving