Mary Berry's fish pie Archive

Ingredients

• 75g/3oz butter, plus extra for greasing
• 1 large onion, roughly chopped
• 50g/2oz plain flour
• 570ml/1 pint milk
• salt and freshly ground black pepper
• 2 tbsp lemon juice
• 350g/12oz fresh haddock, cut into 1cm/½in pieces
• 350g /12oz smoked undyed haddock, cut into 1cm/½in pieces
• 4 hard-boiled free-range eggs, roughly chopped
• 900g/2lb potatoes, peeled and cut into even-sized pieces
• about 8 tbsp hot milk
• about 50g/2oz butter