What are kidney beans?
Native to the Americas, kidney beans are so called because of their shape and come in very many sizes and colours, from ivory-white to blood-red and black. Although differing a little in flavour and looks, they are often interchangeable in recipes.
How to prepare kidney beans
Red kidney beans are poisonous if not boiled furiously for 20 mins during their initial cooking. The secret is never, ever to cook them in the water in which they have been soaked but to drain and then rinse them well before putting into fresh water. The soaking water absorbs much of the ingredient that upsets the gut.