How is blood bread traditionally prepared in different cultures around the world?

Blood bread, also known as blood sausage or black pudding, is traditionally prepared in various cultures by combining animal blood with a mixture of grains, spices, and sometimes fat. The ingredients are typically cooked and then stuffed into a casing before being boiled, baked, or fried. Different regions may have variations in the specific ingredients and cooking methods used, resulting in unique flavors and textures for this traditional dish.