In the top part of a double boiler, mix together flour and sugar. Add boiling water; cook for 15 minutes, stirring frequently. Add beaten egg, yolks, and evaporated milk. Cook until smooth and thickened: remove from heat. Add lemon rind and juice. Cool. Pour into pastry shell*, top with meringue.
Brown in 400 degrees F oven for 8 to 10 minutes, or until top is browned.
From The Clabber Girl Recipe Book "RECIPES TO WARM THE HEART" This was originally featured in our 1930 Clabber Girl Baking Book.