<human>:  What is the best way to tenderize a pork roast?
<bot>: The best way to tenderize a pork roast is to marinate it in a mixture of acidic ingredients such as vinegar, citrus juice, or yogurt to break down the fibers, or to pound it lightly with a meat mallet to help break up the muscle fibers. You can also slow-cook the pork roast to make it more tender.