Spaghetti with meatballs are part of the culinary tradition of the Abruzzo, Apulia, Sicily, and other parts of southern Italy. A recipe for rigatoni with meatballs is in "Il cucchiaio d'argento" ("The Silver Spoon"), a comprehensive Italian cookbook known as the "bible" of Italian cooking. Other dishes that have similarities to spaghetti and meatballs include "pasta seduta" 'seated pasta' and "maccaroni azzese" in Apulia. Some baked pasta dishes from Apulia combine pasta and meat where meatballs, mortadella, or salami are baked with rigatoni, tomato sauce, and mozzarella, then covered with a pastry top. Other pasta recipes include slices of meat rolled up with
Blood type diet "wrong" diet. The underlying hypothesis of blood type diets is that people with different blood types digest lectins differently, and that if people eat food that is not compatible with their blood type, they will experience many health problems. On the other hand, if a person eats food that is compatible, they will be healthier. That hypothesis is, in turn, based on an assumption that each blood type represents a different evolutionary heritage. "Based on the ‘Blood-Type’ diet theory, group O is considered the ancestral blood group in humans so their optimal diet should resemble the high animal protein diets