As soon as the beans boil, cook it for 10-15 minutes, then drain the water, rinse it, fill it with cold water again and put it to cook for 10 minutes a second time, then repeat this procedure for the third time, drain, rinse, pour fresh cold water and now put it on low heat to cook for 30 – 40 minutes. We need to cook the beans almost until they are ready, so that they are soft, but elastic, as if slightly undercooked. Keep in mind that it will still be cooked in the soup along with all the ingredients for 15-20 minutes, so that all the flavors are combined at the end.