Soak the dried black beans in enough water overnight for about 8 hours. Then drain the beans and discard the soaking water.
Cut the onion and green pepper into medium-sized cubes and fry in a saucepan with a little olive oil. Add the chopped garlic and fry briefly.
Then add water, tomato paste, caraway seeds, oregano and salt to the saucepan and simmer gently for 2 hours until the beans are cooked through. Stir occasionally. Season to taste with vinegar, pepper and salt before serving.
Serve on a bed of rice and drizzle the rice with a little lime.