Crush the Brazil nuts, with a pestle and mortar or in a mini food processor, to a coarse paste. Tip into a saucepan, then add the kidney beans, including the liquid from the can. Fill the can halfway with water and add that too. Stir well, then add the rest of the ingredients except for the lime juice.
Heat gently for 15 mins, then mash the beans with a potato masher until they have a loose porridge-like consistency. Keep cooking, stirring occasionally, until the mixture is still soft, but not runny, then add the lime juice and seasoning to taste. Try using the beans in our Brazil nut burritos.