In a mixing bowl, blend egg yolks, salt, sugar and 1 tbsp of lemon juice. Slowly add 1 cup of oil a few drops at a time, beating thoughly, add remaining oil a little faster, carefully blending in each bit before adding more.Add the remaining 2 tbsp of lemon juice
In a Medium bowl mix flour, mustard, boiling water and vinager till smooth. Pour into a small saucepan and cook till smooth and paste like
Slowly add hot mixture to the mayonaise and mix well.
Pour into a container and keep in fridge