I will post the recipe I use, Cyn- I don't know the CI recipe
This is very T&T- I do often have to roast longer- it depends on the potatoes I use. But it is a very good recipe.
HASSLEBACK POTATOES
6 servings
6 medium baking potatoes, peeled
1/4 cup (1/2 stick) butter, melted
1/2 cup whipping cream
2 tbsp shredded Swiss (or Parmesan) cheese
Preheat oven to 325 degrees. Place a chopstick on either side (horizontal) of the potato so you won’t cut through to the bottom. Using a sharp knife, cut potatoes almost through cross-wise in 1/8” thick slices. Place in ice water to prevent darkening. Drain well and put in shallow baking pan. Brush with butter (or drizzle). Bake until tender- about 1-1/2 hours, basting occasionally with cream and pan drippings. Sprinkle with cheese in last few minutes. They will fan out and look spectacular.