Finely grate the Parmesan cheese. Finely chop the ham and mortadella and put in a bowl with ½ of the Parmesan, the minced meat, egg. Season with grated nutmeg, pepper and a small pinch of salt and mix thoroughly until smooth. Break the lasagna sheets into irregular squares of 3 – 4 cm. You can also use fresh lasagna sheets or wide pappardelle and cut them into pieces with a knife. Preheat the oven to 100°C / 200°F.