By Kit Chapman
To make the noodles, combine all the ingredients together to form a smooth paste and rest for 1 hour. Roll out very thinly and cut into fine strips. Put into boiling salted water and bring back to the boil. Take off the heat and drain immediately, then leave in cold water for 20 minutes.
Drop the langoustines into boiling salted water, bring the water back to the boil and remove them al