600 g Potatoes
6 tbsp Parmesan cheese
1 egg
Salt
6 tbsp Flour

for the stuffing:

100 g ham
100 g Edamer cheese

Put the unpeeled potatoes in a pot full of water.
Boil until the potatoes are fully cooked and soft by pricking them with a fork.
Pass the potatoes through a potato masher and put them in a bowl with the grated Parmesan cheese, flour, egg and a pinch of salt.
Mix well all the ingredients then transfer the mixture onto a sheet lined with baking paper. (oiled or floured otherwise everything will stick).
Roll out the potato mixture and place the slices of ham and slices of Edamer cheese on top.
Roll up on the long side and close the potato roll tightly inside the baking paper.
Put the roll directly into a pan in a preheated oven at 200° for 25 minutes then remove the baking paper and let it finish cooking for another 15 minutes.
Remove the potato roll from the oven and wait a couple of minutes before serving it.