: For individual slices, some suggest using a microwave with a few tablespoons of beef broth for 1–2 minutes to gently take the chill off without overcooking. Fully cooked prime rib from Sam's Club - Facebook
You can purchase pre-cooked roasts from these online and local sources: buy cooked prime rib
: Since most pre-cooked roasts are sold rare, you can achieve your preferred level of doneness (Medium, Medium-Well) by extending the reheating time. : For individual slices, some suggest using a
: Most roasts should be warmed "low and slow" in an oven (around 250°F–300°F) until they reach an internal temperature of roughly 120°F–130°F for a perfect medium-rare. : For individual slices