WASH beans, put them in a pot with enough water and a piece of onion. Boil until they get cooked, if it is necessary add a little bit more of hot water. If you use a press cooker, cooking will be faster.
IN another pot heat oil, fry chopped onion until it turns soft, add garlic and fry for a few more minutes. Add peppers and don´t stop moving until they get soft.
ADD “chile cuaresmeño” slices, mushrooms and cummin letting everything integrates; add tomato purée and cook over low heat for a few minutes.
INCORPORATE tomatoes with all the soup. Let it boils and check season. Add chicken soup to your liking. When it has boiled for a few minutes, sprinkle cilantro on it before serving.