Firstly, you have to soak the beans in water for about 12 hours (I usually let it soak for the night). And yes, I do add some stuff with it, like chickpeas, lentils, carrots, onions, garlic, lemon (with its skin), tomato and coriander seeds. Then I cook it in the pressure cooker for about 4 hours. After the beans are cooked, follow the recipe I gave above.