Shingling these potatoes is as easy as thinly slicing each (just not all the way through) before roasting them. The result is a beautiful display. Put them in the oven 30 minutes before the beef goes in so that everything is ready at the same time.
Preheat oven to 425 degrees. Peel one long side of each potato. Thinly slice each crosswise, cutting only three-quarters of the way through, keeping bottoms (unpeeled portions) intact. Brush sliced portion of potatoes with olive oil. Season with salt. Bake on a baking sheet in the lower third of the oven until tender and slightly golden, about 1 hour 5 minutes.