Method
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1
Preheat oven to 220°C fan bake.
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2
Melt butter in a pot and when it begins to foam add the flour. Stir for about a minute and add in mustard powder and nutmeg. Gradually whisk in milk, stirring constantly, until a thick, smooth sauce is produced. Season to taste.
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3
Stir in the smoked fish, parsley and chopped boiled eggs. Place in an ovenproof dish. Top with mashed potato and grated cheese. Bake for 25-30 minutes, or until sauce is bubbling and potato is golden.