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      4 halibut steaks 
      600 ml/1 pt/2.5 cups Fish Stock 
      15 g/0.5 oz/1 tbsp butter or margarine 
      
      15 ml/1 tbsp oil 
      1 onion, chopped 
      150 ml/0.25 pt frozen concentrated orange juice 
      5 ml/1 tsp chopped tarragon 
      15 ml/1 tbsp chopped parsley 
      Salt and freshly ground black pepper 
      
      10 ml/2 tsp cornflour (cornstarch) 
      
      15 ml/1 tbsp water 
      150 ml/0.25 pt soured (dairy sour) cream 
      1 orange, peeled and sliced 
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      Method : 
      
      Place the halibut in a greased flameproof dish, pour the stock over, bring 
      to the boil and poach for 10 minutes. Transfer the fish to a warm serving 
      dish, remove the skin and bones and keep it warm. Reserve 150 ml/0.25 pt 
      of the cooking liquor. Heat the butter or margarine and oil and fry (saute) 
      the onion until soft, then stir in the orange juice, reserved fish liquor 
      and herbs and season to taste. Bring to the boil, then simmer for 4 
      minutes. Blend the cornflour to a paste with the water, then stir into the 
      sauce and cook, stirring, until the sauce thickens. Remove from the heat 
      and stir in the soured cream, then pour the sauce over the halibut and 
      serve garnished with the orange slices.  |