Lightly sprinkle a sheet of parchment paper with flour to prevent the dough from sticking to it. Roll the dough into a thin layer 0.5 cm wide.
Sprinkle the dough generously with sugar and cinnamon. Roll over the sprinkles with a rolling pin to compact them into the dough a little.
Roll the dough tightly into a roll and cut into portioned buns 1.5-2 cm wide.
Place the snails on the parchment paper so that there is enough space between them. They will increase in size considerably when heated.
Brush the snails with egg yolk to give them a nice golden brown color.
Bake the snails in an oven preheated to 180 degrees for about 15 minutes. Sprinkle the finished dessert with powdered sugar, garnish with a mint leaf and serve with your favorite berries.