The nut of this tree is a bit of a nutty business. What is called ‘cashew apple’ (and is commonly believed to be the fruit of the tree) is actually a false fruit. It is a developed part of the receptacle of the flower of a cashew tree. The real fruit is the kidney shaped drupe that is found on the bottom end of the cashew apple. It is the kernel inside it that is the most valuable part of the cashew tree, ‘the cashew nut’...