This casserole dish requires some extra planning, but it's well worth it. The cooking of the tongue can be done a day ahead and chilled overnight. The cranberry sauce goes great over a side dish of baked sweet potatoes, too. If you're in a rush and have a jar of lingonberry preserves around (like that sold at IKEA), the tartness of the berries makes a great and fast substitute for the cranberry sauce. Adapted from Cooking in a Casserole by Robert Ackart (1973).