leave to rest.
place potatoes in a saucepan of salted water and bring to the boil. reduce the heat and allow to simmer for 5-8 minutes, just so they are slightly soft around the edges. drain and place saucepan back over the heat. shake saucepan to dry off potatoes. score the surface of each with a fork to scruff them up.
place oil and butter into a roasting dish and place in oven to heat. add potatoes, tossing well so that every surface is covered. roast for 45 minutes at least until thoroughly golden and crisp. sprinkle with a little salt before serving.
serve slices of beef with the potatoes, peas, gravy and 