I spent Christmas in a lovely little log cabin in Northern Sweden. And when I told my friend Josephine, who is half Norwegian and half Swedish, that I would be in Sweden for Christmas, she sent me a long list of foods I needed to buy at the grocery store, as well as traditional Swedish recipe I could make: And she said that I had to make Jannsons frestelse, or Jansson’s Temptation, for Christmas. Janssons frestelse is a Swedish casserole with potatoes, onions, anchovies (or sprats), and cre...