To make your bottom round roast super tender, consider using a low and slow cooking method such as braising or slow-roasting, which helps break down the tough connective tissues in the meat, and be sure to slice against the grain to further enhance its tenderness and enjoyability.
Don't carve that roast right away! Let it rest for at least 15 minutes after cooking. This allows the juices to redistribute throughout the meat, making it extra tender and juicy when you slice it.