Mastering the art of cooking beef to perfection can prove a real challenge, as there's a fine line between underdone and overdone. Recently, acclaimed British chef and restaurateur Angela Hartnett revealed her roast beef recipe that delivers both a succulent, tender middle and depth of flavour. During a recent instalment of the Dish from Waitrose podcast, Angela whips up a roast beef feast for actress Jennifer Garner . Her preferred cut? Wing of beef, which comes from the upper portion of a