Moronga

Moronga, rellena, morcilla or mbusia is a kind of blood sausage. It is found in Argentina, Cuba, Colombia, Puerto Rico, Central America, Mexican and Paraguay cuisine. Spices, herbs , onions and chili peppers are added and then boiled in the pig's large intestines for casing for several hours. It is served in a sauce, either "chile rojo" or "chile verde". It is also served in central Mexico as a filling in gorditas and tacos after it has been pan-fried with fresh onions and jalapeño peppers. This sausage is called "morcilla" in the Yucatán Peninsula, and it is almost always served along with other sausages (buche) and a mix of pickled onion, cilantro, and spices.

Source: Wikipedia