Total Cost - 2½d. Time - One Hour.

Cut off the roots and green tops of the leeks and wash well. Put them into a saucepan with the stock and stew very gently till soft; take them up and put on to a hot dish. Put the butter into a saucepan, and when it is dissolved stir in the flour, mix well, and strain in the stock. Stir until it boils. Season with some pepper, salt, and a few drops of lemon juice. Pour over the leeks, and serve.