The Swedes have a special drink which is sold during the Christmas period which is a cross between a sweet root beer and coca cola.  It’s so popular in fact that the Coke’s sales drop by almost 50% over the christmas period.  I first came across this method when I was younger, glued to one of Nigella Lawson’s TV programs.  Boiling the ham in this liquid gives a sweet and almost spicy taste.  You can bake your ham with any topping you like and something like a maple glaze is delicious, but this mustard and breadcrumb topping is traditionally Swedish and is absolutely delicious.