Place water, vinegar, salt and pepper in a small
saucepan and reduce by two thirds.
Remove from the heat and place on the back of the stove.
Place the remaining water, egg yolks and the reduction into a stainless
Cook over medium heat while whisking constantly.
When the yolks turn a light yellow and thicken slightly you can begin to
add the melted butter gradually while whisking constantly.
If it begins to thicken add a few drops of warm water occasionally as
Correct seasoning with salt and a few drops of lemon
Pass through a fine strainer or cheesecloth and keep
warm to prevent the sauce from separating.