Short answer
Cozido das Furnas is a traditional Azorean stew cooked underground using volcanic heat in the Furnas area of São Miguel. Meats, sausages, vegetables and sometimes blood sausage are layered in a pot, buried in the hot soil for several hours, and then unearthed. The result is a rich, earthy-flavored dish. To try it, visit Furnas and look for restaurants that offer it; confirm availability locally.
General information, not legal or tax advice. Rules and amounts change: confirm with official sources.