This food may not be the food of choice for fans of chocolate pudding - anyway, black pudding is native to the British Isles but is consumed throughout the world. Its basic ingredient is congealed blood stuffed into sausage skin. It's usually served as part of an English breakfast and is low in carbohydrates and high in zinc and iron, in other words, it is the perfect hangover food.
Its other uses are as a reward treat in canine training (such as the case in the military and police forces from around the world). Novel culinary uses for black pudding include black pudding ice cream (can't imagine what that looks like), while perhaps more conventional modern recipes include using it as an accompaniment to pigeon or scallops.