One does not need a recipe for fishcakes. Add flavour with sauteed onions, celery and carrots, perhaps some red pepper too. Add substance with cool mashed potatoes and dry bread crumbs. Bind it all together with an egg or two.
Saute in 2 tbsp each butter and olive oil on medium high heat.
If you've ever made fishcakes with canned salmon, you simply must try it with fresh.