For the maroon dumplings, remove the crust from the old toast bread and grind to fine flour. Mix the ground toast with the curd cheese, 2 eggs, the egg yolk, powdered sugar, flour and the melted butter until a smooth dough is formed. Let the dough rest in the refrigerator for 2 hours.
In the meantime, season the chestnut puree with 150 g of sifted powdered sugar and the rum and refrigerate.
Make palm-sized patties from the curd dough. Place a tablespoon of the chestnut mixture in the center of each one and close it to form a dumpling.
Bring a large pot of lightly salted water to a boil on the stove and let the dumplings steep for about 12 minutes.
For the cinnamon crumbs, melt 100 g of butter and mix the bread crumbs with 1-2 tablespoons of powdered sugar and a teaspoon of cinnamon and toast.
Carefully lift the cooked dumplings out of the water and roll them in the cinnamon crumbs.