900g Floury Potatoes
2 tbsp Olive Oil
600ml Semi-skimmed Milk
800g White Fish Fillets
1 tbsp Plain flour
Grating Nutmeg
3 tbsp Double Cream
200g Jerusalem Artichokes
1 finely sliced Leek
200g peeled raw Prawns
Large handful Parsley
Handful Dill
Grated zest of 1 Lemon
25g grated Gruyère
Juice of 1 Lemon
1- 01.
2- Put the potatoes in a large pan of cold salted water and bring to the boil.
3- Lower the heat, cover, then simmer gently for 15 minutes until tender.
4- Drain, then return to the pan over a low heat for 30 seconds to drive off any excess water.
5- Mash with 1 tbsp olive oil, then season.
6- 02.
7- Meanwhile put the milk in a large sauté pan, add the fish and bring to the boil.
8- Remove from the heat, cover and stand for 3 minutes.
9- Remove the fish (reserving the milk) and pat dry with kitchen paper, then gently flake into an ovenproof dish, discarding the skin and any bones.
10- 03.
11- Heat the remaining oil in a pan, stir in the flour and cook for 30 seconds.
12- Gradually stir in 200-250ml of the reserved milk (discard the rest).
13- Grate in nutmeg, season, then bubble until thick.
14- Stir in the cream.
15- 04.
16- Preheat the oven to 190°C/fan170°C/gas 5.
17- Grate the artichokes and add to the dish with the leek, prawns and herbs.
18- Stir the lemon zest and juice into the sauce, then pour over.
19- Mix gently with a wooden spoon.
20- 05.
21- Spoon the mash onto the fish mixture, then use a fork to make peaks, which will crisp and brown as it cooks.
22- Sprinkle over the cheese, then bake for 35-40 minutes until golden and bubbling.
23- Serve with wilted greens.