Add the beef back into the casserole and sprinkle with the flour ... Meanwhile, to make the kale mashed potato, place the potatoes into a large saucepan and cover with cold water.
Heat 2 tablespoons of the oil in a deep, heavy-based, flameproof, lidded casserole over a high heat. Add the beef, in batches if necessary, and fry for 4-5 minutes, or until browned all over.