 
      
    
1 kg (2 lb) cooked prawns, peeled lettuce cups, tomato, 
  spring onions, cucumber and any other ingredients you care to add
  
    
      For the avocado dressing
    2 avocados 
    grated rind and juice of 1 lemon
    freshly ground pepper and salt
    1 onion, grated
    1/4 teaspoon paprika
    1 tablespoon olive oil
    1/2 teaspoon tarragon vinegar
    
      
    Wash the avocados and dry. Cut in half lengthwise, remove seed. Scoop flesh 
    
    out into basin, mash a little with a silver fork or wooden spoon. Add grated 
    
    rind and juice of lemon, pepper and salt, onion, paprika and vinegar Mix. Beat 
    
    in olive oil with a wooden spoon, or puree mixture in a blender. Cover and refrigerate 
    
    until needed. This makes 3 cups of puree. Put lettuce cups on plates and fill 
    
    with prawns. Arrange other salad ingredients attractively around prawns. Serve 
    
    salads with dressing poured over, or in a separate bowl so that guests can help 
    
    themselves.
    Serves 6.