Step 1

Preheat oven to 500°F (260°C).

Step 2

Mix together the butter, garlic, herbs, salt, and pepper in a bowl until evenly combined.

Step 3

Rub the herb butter all over the rib roast, then place on a roasting tray with a rack.

Step 4

Bake for 5 minutes per pound (10 minutes per kilo) of meat, so a 5-pound (2.2 kg) roast would bake for 25 minutes.

Step 5

Turn off the heat and let the rib roast sit in the oven for 2 hours, making sure you do not open the oven door or else the residual heat will escape.

Step 6

Once the 2 hours are up, remove the roast from the pan and pour the pan drippings into a saucepan over medium heat.

Step 7

Add the flour, whisking until there are no lumps, then add the beef stock, stirring and bringing the sauce to a boil.

Step 8

Remove from heat and strain the sauce into a gravy dish.

Step 9

Carve the prime rib into ¾-inch (20 mm) slices.

Step 10

Serve with the mashed potatoes, green beans, and sauce!

Step 11

Enjoy!