Lanttulaatikko or kålrotslåda (swede casserole) is a swede (rutabaga) casserole that is a traditional christmas dish in finland. it is usually served with other casseroles at the christmas table as a side dish to ham, fish or other meats. traditional lanttulaatikko is made of boiled and mashed swede, sweetened and enriched with a mixture of bread crumbs, egg, cream, treacle, butter, and seasoned with salt and various spices (such as ginger, cinnamon and nutmeg). this mixture is placed in a casserole dish, often with a decorative pattern forked over it (or topped with more bread crumbs). it is then baked in a low oven at 175 °c (347 °f) for an hour and a half.

Source: Wikipedia