Grilled Skewers of Beef with Garlic and Bay Leaves

1. Place all ingredients in a shallow baking dish and toss well.
2. Let marinate in the refrigerator 2 hours or up to 2 days, tossing the mixture occasionally.
3. Let stand at room temperature while preparing the grill.
4. Thread the beef on 6 or 8 long metal skewers, dividing the total amount evenly.
5. Heat the marinade in a small saucepan 2 to 3 minutes, brush lightly over the espetada.
6. Over charcoal: Pour the remaining marinade into a small heavy saucepan and set at the edge of a grill, adjusted so that it is about 5 inches above white-hot coals.
7. Lay the skewered beef on the grill and cook, turning often, about 5 minutes for very rare, 7 minutes for rare, and 9 to 10 for medium-rare, brushing frequently with marinade.
8. In the broiler: Lay the skewers on a lightly greased broiler pan, place 5 to 6 inches from the heat, then broil, turning frequently, about 6 minutes for very rare, 8 minutes for rare, and 10 for medium-rare.
9. Brush frequently with marinade.