Put the fish fillets and the smoked salmon through the meat grinder. Finely chop the onion, fry it and add it to the fish farce. Add about half of the breadcrumbs and also add the parsley, egg and milk to the fish and stir into an even mixture.
Shape the meatballs and turn them in the remaining breadcrumbs until they are completely coated.
The meatballs taste best when fried in hot fat for about 5 - 10 minutes. But you can fry them just as well.