This is the traditional Peruvian dish, frijoles negros escabechados: spiced black beans marinated in red wine vinegar. The black beans to use here are black turtle beans. Chinese black soy beans, Japanese black aduki beans, or Indian black urad beans are not really suitable for this recipe.
Black turtle beans have only been available in the UK for the past few years and, sadly, they are under-utilised. This is a shame because they have a sweet, floury earthiness that makes them very versatile.
I don’t normally like the combination of sweet and sour flavours, but I really enjoy the sweet, tart and deeply savoury tastes in this recipe. So much so that I always try to sneak this dish into the menu whenever I’m cooking Latin American food.
Serve the beans at room temperature with plain, steamed white rice, as Peruvians do. Alternatively, they are excellent as a salad or side dish, served on a bed of shredded lettuce and accompanied by avocado slices. Serves 4 to 6.
6 oz/ 150g black turtle beans, soaked overnight, or for several hours
4 oz/ 100g raisins
¼ pint/ 150 ml red wine vinegar
3 tablespoons corn oil
2 teaspoons cumin seeds
1 teaspoon red chilli flakes (or to taste)
2 large onions, trimmed, peeled and finely sliced
3 cloves garlic, peeled and minced
Salt and pepper
4 oz/ 100g pitted black olives
2 hard-boiled eggs, shelled and quartered
Cooked white long-grain rice
1. Drain and rinse the soaked beans. Cover them with fresh water, bring to the boil, and cook vigorously for 10 minutes. Drain and rinse again thoroughly to remove any toxins. (It is believed that some varieties of beans contain toxins, so this procedure is recommended when cooking black turtle beans). Cover with more fresh water, bring to the boil, and cook for an hour or so until the beans are tender. Now drain the cooked beans and set aside.
2. Meanwhile, soak the raisins in the vinegar.
3. Heat the oil in a large saucepan. Add the cumin seeds and chilli flakes, and let them sizzle for a few seconds until they are a shade or two darker.
4. Add the onions, and fry until lightly tinged with golden brown colour.
5. Add the garlic and raisins (leave the vinegar aside) and sauté for a few minutes.
6. Add the cooked beans and seasoning, and mix well.
7. Pour in the vinegar in which the raisins have soaked. Add some water if necessary. Bring to a boil. Lower the heat, and simmer for 10 minutes. The dish should be fairly moist – neither dry, nor too sauced. Adjust the seasoning.
8. Garnish with black olives and hard-boiled eggs. Serve at room temperature.