Actress Jane Seymour joins Martha to make corned beef and cabbage. First, make the pickling brine using hot water, dry mustard, garlic cloves, and pickling salt. Put the beef brisket into the pickling brine, and cook with onions and celery and garlic cloves. Add cabbage along with red potatoes, parsnips, turnips, and carrots. A perfect boiled dinner for St. Patrick’s Day.