Frijoles Negros Volteados (Fried Black Bean Paste - Guatemala)

2 cups black bean pur e (canned
    refried black beans)
1 tablespoon oil

Heat oil over moderate heat in skillet. Add bean puree and mix well with wooden spoon. Stir until puree thickens and liquid evaporates. Continue until mix begins to come away from skillet and can be formed by shaking the skillet to give a sausage shape. Serve warm with tortillas, farmers cheese, sour cream, bread or with all at once.