Peel the potatoes, don`t cut them and cook them through. Clean the vegetables, cut them into small pieces and cook them or prepare frozen vegetables according to the instructions.
Thaw the fish and fry it in the pan, continue to fry it with the lid on over a low heat until it is almost cooked. Divide the fish into bite-sized pieces.
When everything is cooked, place in a baking dish, mix, if necessary, add fresh herbs and a splash of lemon. Spread the hollandaise sauce over the whole and then sprinkle with the grated cheese. Baked at 200 ° C for approx. 30 minutes.