Posta Negra con Ciruelas Pasas

Blackened beef (Posta Negra) is a delicious dish and one that originated in Cartagena de Indias, our lovely walled city in the Caribbean. Here I make it lighter by accompanying it with a prune sauce that is more typically used in Colombia with pork. It is a delicious way to blacken the beef and flavor the sauce without all the sugar from the ingredients (brown sugar and cola) in the original recipe.