Pre-heat your oven to 375°F and then take the roast out of the airtight bag and place it in a deep dish tray, lined with grease paper with the fat side up of the roast, sliding this into the oven timed for an hour. Once your time's up, turn the oven off and leave your roast inside without opening the mouth of the oven for 3 hours. Then crank the heat up again to 375°F, re-heating your rib eye roast for 30 minutes.