ärtsilaatikko

Ärtsilaatikko is a traditional Finnish baked dish in the laatikko (casserole) family. The defining idea is a hearty, oven-set dish built from layered ingredients that are cooked together in a single baking dish. Although recipes vary by region and family, the most common approach uses a starchy base, often potatoes, as the main layer, combined with some form of protein and vegetables.

Typical ingredients include potatoes (sliced or parboiled), onions, and a protein such as pork, beef, fish, or a combination. Seasoning is usually simple—salt and pepper—with optional herbs like dill, parsley, or marjoram. A binding mixture of eggs and milk or cream is poured over the layers to help the dish set as it bakes. Some variations incorporate other grains or binders, such as rye flour, barley, or breadcrumbs, to add texture and heartiness.

Preparation generally involves layering the ingredients in a greased dish, finishing with the egg-milk mixture, and baking at a moderate temperature until the top is golden and the interior is firm. Variants exist that omit meat for a vegetarian version or adjust fillings to include different fish or vegetables.

Serving is typically hot as a main course, with accompaniments like pickled cucumbers, lingonberry jam, or a dollop of sour cream. Ärtsilaatikko is associated with Finnish home cooking and rural culinary traditions, reflecting the tendency to create filling, practical meals from available ingredients.