Unattended Rib Roast - cooking recipe

Ingredients

1 (3 lb) standing rib roast (no size was specified in recipe, but I couldn't post it without one)
salt and pepper

Preparation

At noon, preheat oven to 375 degrees.
Season roast with salt and pepper.
Put roast in preheated oven, uncovered.
After 1 hour, turn oven off and DO NOT OPEN THE DOOR.
Thirty to Forty minutes before serving, turn oven on again to 375 degrees.
Roast will be medium-rare in center and well done around the edges.