Start by boiling the potatoes with their skin on.
Once boiled, let them cool down and then carefully peel them.
Mash them with a potato masher.
Mix the mash with an egg and then start adding the flour gradually.
The amount of flour will vary, depending on the water content of the potatoes.
Knead with your hands and add flour until you obtain a soft dough. It will be very sticky.
Cut the plums halfway, and remove the pit.
Whilst the dough is resting, make the coating of the plum dumplings.
Melt the butter in a pan, and add the breadcrumbs.
Mix well until the breadcrumbs start to roast.
Add the sugar and the cinnamon, leave it for one more minute, then take away from the heat.
Fill a large pan with water and a pinch of salt, and bring it to a boil.
Water your hands to work the dough better.
Add a bit of dough in your hands and put a plum without the pit, in the middle.
Work the dough around the plum, to make a ball.
Drop the dough ball in the boiling water.
Continue until you finish the dough and the plums.
Don’t overcrowd the pot where they are boiling. I found that 4 is the magic number for my pot.
Once they are ready, after 5-6 minutes, they will rise to the surface.
Take them out with a skimmer and drop them in the breadcrumb mix.
Roll them until covered on all sides and take them out on a platter.
Serve the plum dumplings hot.