Soak the buns. Peel onions. Put minced meat in a bowl and grate onions over it. Squeeze out the buns and add. Add eggs and dried thyme, season with salt and pepper.
Knead everything into a smooth mass. Spread a thin layer of oil on the oven pan. Smooth the minced meat in it. Pre-bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 30 minutes.
In the meantime wash the tomatoes, grate them dry and cut them into slices. Halve the olives. Remove the meatloaf, spread a thin layer of ketchup on it. Cover with tomato slices and olives. Sprinkle cheese on top.
Bake at the same temperature for another 20-25 minutes. Remove the pizza, cut it into pieces and garnish with thyme.