Traditionally the skewer isn't even metal — it's a fresh-cut bay laurel branch, which perfumes the beef with its oil as the meat cooks and rests.
Chunks of beef are seasoned with garlic, salt and bay laurel, threaded onto a laurel branch or long skewer, and grilled over open wood coals, often served hanging vertically above the table. Common at Madeira's street food stands and festas.