When you marry a Norwegian, you gain more than just a bride or groom. When John Hinsch, a German, married Jan Hilan, who is both Norwegian and Swedish, he acquired a set of Christmas food traditions that encompasses what many consider the best and the worst of culinary options. The best: Who could turn down rosettes and krumkake, lefse, meatballs and rommegrøt? The worst: By reputation - lutefisk. Songs, jokes and entire humor books have been written poking fun at the shimmering white fish which is a staple in Scandinavian-American households at Christmastime. "I ate about a half-teaspoon of lutefisk...