Cut the green part of the leek and remove the hairy base. Cut the whites into quarters and then into 1cm long pieces. Soak them for a few minutes in fresh water and rinse them well.
Wash the fresh green beans thoroughly in vinegar water without soaking them.
Trim them by hand and cut them into 3 to 4 cm pieces.
Check with your index finger that the scalloped fish has no bones, then cut it into small pieces.
Put the leek white in the steamer basket.
Put the green beans in the steamer basket.
Put the pollack in the steamer basket.
Pour water into the tank and start the express cooking process.
Reserve the cooking juices.
Put the contents of the basket in the bowl.
Put the dab of butter in the bowl.
Add some of the cooking juice depending on the desired texture. Make it smoother for stage 2 and chunkier for stage 3!