Pajata - a Roman speciality made from calf intestines
Pajata is a dish made from young calf intestines, which are cooked with undigested milk inside. The result is a thick sauce that in Rome is served with pasta, most often rigatoni alla pajata.
Casu Marzu - 'live' cheese from Sardinia
This cheese is considered one of the most extreme delicacies in the world. It is a sheep's cheese that is deliberately left to the larvae of flies. They soften it and give it its specific consistency and taste. Traditionally, it is eaten with the larvae, but legally it cannot be sold in the EU. Sardines still make it unofficially, but it occasionally appears at festivals .

Testicoli di toro - Sicilian bull testicles
They are considered a delicacy and are prepared fried, stewed or as part of a ragout. In Sicily they are served under the name 'granelli'.
Lampredotto - cow stomach sandwich (Florence)
This traditional street food is made from the fourth stomach of a cow, which is cooked in a broth with tomatoes, onions and herbs. It is then stuffed into a bun and covered with a spicy sauce. Locals love lampredotto, but tourists often avoid it.

Sanguinaccio dolce - a sweet dessert made from pig's blood (Campania)
This special sweet is made from pig's blood mixed with chocolate, sugar and spices. It has a smooth consistency and is particularly popular during Shrovetide.