Soak rolls in cold water. Peel and chop the onion. Cut mozzarella into small cubes. Clean, wash, quarter and seed the tomatoes. Dice the flesh as well.
Knead the minced meat, squeezed bread roll, egg, tomato and mozzarella cubes. Season with salt, sambal oelek and dried herbs. Shape into a loaf and place on a greased baking tray. Bake in the preheated oven (electric: 200 °C/ gas: level 3) for about 50 minutes, then let it cool down a little.
In the meantime, defrost the pizza slices slightly and let them rest. For the sauce, wash the herbs, chop roughly and puree. Peel garlic and press it through a garlic press. Heat the fat and fry the garlic in it.
Sweat flour in it. Add cream and stock while stirring constantly and bring to the boil. Stir in pureed herbs. Season to taste with salt and pepper. Whip the roast in the pizza dough. Spread with whisked egg yolk and decorate with basil leaves.
Bake again for about 15 minutes. Serve the roast with the sauce. Serve with tomato salad and olives.