used up all of your potatoes. pour the milk mixture over the top and finish off with grated cheese and a good twist of black pepper. bake in the oven for 45-50 minutes and leave to rest for 5 minutes before serving.
heat the beef juices and stir in the balsamic vinegar. mix the mustard powder with a little water and stir that in too. bring to the boil and simmer for a couple of minutes before adding the gravy mix. leave this to simmer on a low heat until needed.
slice the beef – due to it being soaked over night it will not come out looking rare but it will 