Sweden have numerous variations of pickled herring. Many recipes are mayonnaise or crème fraiche based such as this recipe. The herring pickle in this recipe has some of the traditional anchovy spices.
Filled egg halves with bleak roe, smoked shrimp and salmon mousse
These filled egg halves could be served on a buffet or as a plated dish. The bleak roe is a Swedish delicacy but you can choose any fish roe you like.