Chuck roast shepherd's pie is a twist on the classic dish that's perfect for a comforting dinner. The chuck roast is cooked low and slow with vegetables like carrots, celery, and onions until it's tender and juicy. The meat is then shredded and topped with a layer of mashed potatoes and baked until everything is hot and bubbly. This dish is perfect for using up leftover mashed potatoes and is sure to be a hit with the whole family.