I am catering an Office Christmas Party for 30 and they want Beef Brisket. I need ideas for a starch side dish. Last year i served roasted potatoes with onions and rosemary for the hot starch side (with roast beef). It will need to be cooked in advance and travel about 20 minutes to be put into chafing dishes at the site. Hopefully something not requiring alot of prep; as in mashed potatoes. Thanks!!