1) Soak beans overnight 2) Pour the water in the pot, bring to a boil, put the soaked beans into the pot and cook on low until the beans are 90% tender 3) peel and cube the potatoes and add to the soup, keep cooking. In the meantime in the saucepan fry chopped onions, when they are golden, add Mushrooms, fry until Mushrooms are tender 4) At the moment when the beans and the potatoes are ready, add the fried onion-Mushroom mixture to the soup. Mix well, add salt, pepper & other spices if you feel them to be necessary. Remove from the heat and leave for 2–3 minutes to develop flavours.