- Place the potatoes in a pan with just enough boiling water.  Cover and bring to the boil, reduce the heat and simmer for 15-20 minutes or until tender, then drain.
- Meanwhile, place the haddock or cod in a deep frying pan with the milk and low-fat spread. Simmer for 10-15 minutes. Drain and flake the fish, retaining the milk to mash with the potatoes.
- Mix together the mayonnaise and 3 tablespoons of the chives.
- Mash potatoes with 200ml of the poaching milk
- Serve the mash in a large heap, topped with haddock or loin  and the remaining chives.
