Mix together the ground pork, the ground leftover roast and the finely chopped bacon.
Add the egg and the squeezed-out bread roll, season with salt and pepper, and work it together thoroughly.
Shape the mixture into a loaf in a greased baking pan.
Bake in a preheated oven at about 200°C for 30-35 minutes, until browned.
Let it cool completely.
Meanwhile boil the potatoes in their skins until tender, peel, mash, season with salt and pepper, and mix in the grated parmesan and the 2 eggs, until you get a smooth purée.
Coat the cooled meatloaf thickly with the potato purée, and brush the top with melted butter.
Return to the oven and bake at 200°C for another 15-20 minutes, until the potato layer is a nice golden brown.
Serve sliced, warm.
Based on: Malatinszky Fanny szakácskönyve (a classic Hungarian cookbook), modernised. Calories and protein are estimated.