Cut the green parts off the leeks and remove the hairy base. Cut the white parts into four pieces and then into lengths of 1cm. Let them soak a few minutes in fresh water and rinse well.
Wash the green beans thoroughly in vinegar water but don’t soak them. Trims the ends by hand and cut them into sections of 3 to 4cm.
Peel the potato, wash it and cut into 1cm cubes.
Run a finger over the pollack fillet to check that no more bones and cut into small pieces.
Place the leeks in the steamer basket.
Place the green beans in the steamer basket.
Place the potatoes in the steamer basket.
Place the pollock in the steamer basket.
Put water in tank 3 and start cooking.
Set aside the cooking juice.
Pour the content of the basket into the blending bowl.
Place the butter into the blending bowl.
Add a part of the cooking juice depending of the desired texture.