The recipe of the day is something you should put in your Cooking Bible. One of the most characteristic condiments of good Italian cuisine, the one that has consecrated the Bel Paese as the best holder of good food. To be on the safe side, we dusted off some of the oldest cooking manuals, that is, those that grandmothers have handed down for generations and it is only thanks to all their invaluable advice that we have prepared the wonderful seasoning typical of lasagna.