John Dory with Mushrooms and Orange

• 4 John Dory, weighing about 450 g/1 lb each, gutted and heads removed
• 150

Begin by making the stuffing: pare the zest from one of the oranges in thick strips, being careful to avoid the white pith. Drop into a pan of boiling water, bring back to the boil and cook for 2 minutes. Drain, then shred finely. Peel both the oranges, removing the pith, divide into segments and skin each segment. Reserve half the segments, the ones that are most perfect, to decorate the finis