I grew up in Panama and one of my favorite restaraunts was 'La Estancia'. Their specialty was the famous Argentinean 'Churrascos' that were grilled on a fire pit and were served with Chimichurri. This recipe is the closest to what they served. I found this recipe at Glenna Anderson Muse's blog A FRIDGE FULL OF FOOD AND NOTHING TO EAT. Enjoy!