Pour the sifted flour, then boiled and crushed the potatoes, the yeast dissolved in warm water or warm milk, the vanilla extract, a pinch of salt, and 2 tbsp of oil into a bowl (where we will let the dough rise).
Knead vigorously until a rather soft but not liquid homogeneous mixture results, making sure that there are no lumps.
Cover the bowl with a cotton cloth and let rise for 2 hours it must double in volume;
With the help of two wet spoons, slide a few portions of the dough directly into the boiling oil and cook for 3-4 minutes, turning them so that they become golden.
Drain on absorbent paper to remove excess oil.
Pass them in the granulated sugar mixed with a little cinnamon.