Make a well in the flour on a pastry board and add the baking powder, sugar, lemon peel, eggs, olive oil, vanilla flavouring (optional) and mistrà. Knead everything together energetically for several minutes to form a firm, well-blended dough. Let the dough rest for about an hour. Meanwhile, heat the seed oil in a large frying pan. Take a spoonful of the dough and dip it into the hot oil. When they are puffy and golden, remove them from the oil with a slotted spoon and place them on absorbent paper. You can opt for different toppings: with honey or with alkermes and icing sugar.