Cut the offal to pieces that are the size of walnuts and let them strain. Season with pepper, sprinkle with oregano and the garlic and start adding them on a spit, alternately. Season with salt last, when you pass the pieces on the spit so that they are not slippery. One piece of liver, one lung, spleen, sweetbreads and then start over. When you are done, squeeze them tight so that there is no space between them and wrap them with the caul fats. Then wrap them as tight as possible with the intestines.