Recipe by: taste.com.au Serves: 4 Time: 20m             Ingredients 25g butter 1 tbsp plain flour 1 cup (250ml) chicken stock 2 tbsp white wine 1/2 cup (125ml) cream 1-2 tsp Dijon mustard or dry mustard powder 750g peeled uncooked prawns 1 tbsp coarsely chopped fresh flat-leaf parsley 1 tbsp olive