[Finnish] plural kalarullat / kalarullia

"Fish roll." This is a roll made with a layer of thick savoury custard and with a filling of smoked fish mashed with crem and dill, rolled up and baked. It is served sliced, often for lunch. It is unusual to use the general term for fish in this context, and you would be more likely to see the name of the fish specified, as in, say, silakkarulla (Baltic herring roll)