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1
Pre heat the oven to 200C/180C fan/gas mark 6 and bake the potatoes in their jackets for about 1 hour until tender in the centre.
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2
Make the white sauce by melting the butter in a saucepan then stir in the flour.
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3
Cook for 1 minute then gradually whisk in the milk.
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4
Once all the milk is added keep stirring and bring everything to the boil.
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5
Simmer for 1 minute then remove from the heat and stir in the cheese and parsley, then season with salt and pepper.
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6
Cover the surface with cling film to prevent a skin from forming.
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7
When the potatoes are cooked cut in half then scoop out the centres and roughly mash, setting the skins to one side on a baking tray.
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8
Add 1/2 of the white sauce to the mashed potato and mix.
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9
Spoon the potato mix back into the potato skins.
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10
Cover the top of each potato with a strip of sole, season then place back in the oven for 10 minutes or until the fish is cooked.
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11
Mix together the remaining white sauce and prawns and loosen if necessary with a little more milk.
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12
Remove the potatoes from the oven, pour over a little of the prawn sauce and scatter with the remaining parsley.