Beat 3 eggs with 3 cups of sugar; add ½ kg of flour mix everything well. Then add 3 tablespoons of extra virgin olive oil and grated peel of 1 lemon and mix well. Finally, add 1 teaspoon of yeast dissolved in ½ cup of cold milk. Having remixed the whole thing put the mixture into a buttered and sprinkled with flour. Bake in a hot oven (180- 200 ° C) for about 40 minutes.