A 4- to 5-pound cured, bone-in ham fits perfectly into a 7-quart oval slow cooker. A larger ham will have to be cut in half and put into two smaller cookers. That works too. Just be alert to the size of the ham you buy—or ask the butcher to cut it in half for you if it’s over 5 pounds. This mustard glaze and dry rub work well on pork and beef roasts too.