Løk med ostesaus is a traditional dish originating from Norway. The dish is usually made with a combination of onions, butter, paprika, flour, curry powder, cream, breadcrumbs, salt, and cheese such as Jarlsberg or Gouda. The onions are boiled until tender and placed into a baking dish.

The white sauce is made with a mixture of butter, flour, and cream. The grated cheese, paprika, salt, and curry powder are poured over the onions and the sauce. The dish is sprinkled with breadcrumbs and baked until bubbly, and it's then ready to be enjoyed.