In English, Black Pudding with Onions, in French, Boudin Noir aux Oignons. gets its colour from the pig’s blood used as an ingredient. The sausages are made from pork, pigs blood, bread, pork fat, and spices. It is a traditional French dish that is best paired with apples and mashed potato. The sausages are slightly fried in a pan after which the chopped apples also get fried in the same pan.