Making restaurant quality prime rib is easy to do.
Note: Pictures below are not compressed, totaling about 30mb.
Perquisites
I good looking prime rib. At least 3 ribs width.
Salt, Pepper
Herbs, if you want
Butter
Meat thermometer with a 3 foot probe
Day 1
Remove prime rib from strings and cut off the ribs from the bottom
Cover in a ton of iodized salt, get all sides and all crevices
Do the same with coarse pepper
May as well chop up some some fresh rosemary and sprinkle that on top
Put the whole thing on a plate and then into the fridge uncovered
The salt will draw out the juices, make the juice salty, then the meat
will draw the juices back in. It's beautiful science.
Day 2
Remove from fridge and let it sit on the counter for about 2 hours until it's room temp
Preheat oven to 200F (F == freedom units)
Butter up a pan put it on high
Sear the hell out of every side of the meat, until it's got almost a candied outside
Put the meat probe in, cook until 125F
About 3 hours @ 5lbs
Take out, let rest for 30ish mins, it will go up to 130F
Slice thick and eat
A note on measuring temperature
You want to cook to a temperature, not a rough time based on weight.
Having a thermometer with a long probe makes life easy because you can cook with the probe in the beef, and constantly watch the temp.
The temperature is likely to start to rise quickly, then plateau / stall, then rise again quickly. So if you are having to constantly interrupt and measure the temperature, you may miss the target.