Clean the leek and cut into small rings. Fry briefly with the salmon fillets and season. Now place the salmon in a baking dish and brush with a little herb butter. Now spread the leek on the salmon. Spread the hollandaise sauce over it. Cut the mozzarella into slices and spread evenly over the top.
Then bake in the preheated oven at 220 ° C until the cheese has melted. This takes about 15 minutes. Rice goes well with it.