Preheat your oven to 450 degrees F (232 degrees C). Combine all of the herbs: salt, pepper, garlic powder, ground sage, dried rosemary, dried thyme, and dried oregano in a small bowl. Rub the prime rib roast with the seasoning blend, making sure to coat all sides evenly.
Place the seasoned prime rib roast in a shallow roasting pan on a rack with the fat side facing upward. Sear the roast for 15 minutes in a preheated oven at 450 degrees F (232 degrees C), then reduce the temperature to 325 degrees F (162 degrees C) and cook for an additional 45 minutes before starting to check the internal meat temperature.
When the internal temperature (inserted into the thickest middle portion of the roast) reaches 120 degrees F (49 degrees C), remove the roast from the oven and transfer to a cutting board. Then cover loosely with aluminum foil, forming a 'tent' over the roast while allowing your prime rib to rest for 20-30 minutes before serving. The internal temperature should be 130 degrees F (54 degrees C) when the roast has rested, before serving.
*(optional) After rubbing the dry seasoning mix into the roast, wrap the roast tightly in plastic wrap then place on a baking sheet and refrigerate overnight. Bring to room temperature before roasting.*Remember that cooking times will vary depending on your oven temperatures and the size of your prime rib portion, rely on your meat thermometer for removing the roast at an internal temperature of 120 degrees F (49 degrees C) and 130 degrees F (54 degrees C) when done resting.https://bakeitwithlove.com/oven-roasted-prime-rib-with-dry-rib-rub/