This is a quick version of a family favourite - use ready- made white sauce and ready mashed potato for a speedy mid-week meal. Top with grated cheese, if preferred, and serve with green beans.
Preheat the oven to 190C/375F/Gas 5.
Put the fish in a roasting tin and cook in the oven for about 10-12 minutes until opaque and starting to flake. When cool enough to handle, take off the skin, remove any bones and flake the fish into large chunks.
Mix with the eggs, prawns, parsley, peas and white sauce, season well and place in a deep ovenproof dish.
Spread the mashed potato on top and dot over the butter.
Bake in the oven for 30-40 minutes until golden brown and piping hot.
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