
This is my favorite mustard sauce to serve with ham and even over asparagus. I often use it in place of hollandaise sauce. For a tangier sauce, add more mustard. For a sweeter sauce, add more sugar. The original recipe came from an old Forum Feasts cookbook, circa 1968.
In a small saucepan, stir together the sugar and dry mustard.
Turn the stove up to a medium heat and slowly stir in the vinegar and water.
Slowly whisk in the beaten eggs. Whisk continuously, over a medium-low heat, until the sauce thickens, about 10-15 minutes.
Pour hot sauce into a pyrex measuring cup or other heat-resistant cup. This sauce can be served hot or cold. It is easily reheated in the microwave and can last in the refrigerator for up to 1 month.