Boil the potatoes, chop them into small cubes and set aside openly so that the surface can dry out a little so that the potatoes don`t soak up the sauce later.
Fry the salmon fillets briefly on both sides in a little butter. Deglaze with the juice and cook until cooked. Remove salmon and set aside. Pour the cream and some milk into the stock and add a lot of rosemary and a little salt. Briefly bring the sauce to the boil.
Add the fish and potatoes again and serve on top of the fish with a little pepper.