How do you tenderize roast beef after it has been cooked?

You can't truly tenderize roast beef *after* it's been cooked. The process of making meat tender happens during the cooking process itself.

However, you can improve the texture of an already cooked roast beef in a couple of ways:

* Thinly slice it: This is the most common and effective way. By slicing against the grain, you break down the muscle fibers and make the meat easier to chew.

* Use a sharp knife: A dull knife will crush the meat, making it tough.

* Serve it with a sauce: A flavorful sauce can mask any slight toughness and add richness to the dish.

Here are some tips to prevent your roast from becoming tough in the first place:

* Choose a cut of meat that's naturally tender: Rib roast, tenderloin, and sirloin are good choices.

* Cook it to the right temperature: Overcooked meat will always be tougher. Use a meat thermometer to ensure the roast is cooked to the desired level of doneness.

* Rest the roast: Let the roast rest for 10-15 minutes before slicing. This allows the juices to redistribute and makes for a more tender result.

* Use a slow and low cooking method: Slow cooking methods, like braising, help break down tough connective tissues and result in a more tender roast.

Important Note: While some methods claim to tenderize cooked meat, like using a meat mallet, these techniques don't actually change the meat's structure. They can make it easier to chew, but they won't make it truly tender.