Dry the cod and gently massage with salt.

In a large fry pan, heat ⅓ butter and fry cod for 4 minutes on each side; occasionally adding butter.

Remove from pan when cooked.

In a large saucepan, boil the green beans until tender.

In a small saucepan, melt the remaining butter.

Plate the cod on top of a bed of green beans, pour over the melted butter and sprinkle the grated horseradish.