?Hovmästarsås is a classic Swedish mustard sauce that is typically served with boiled or grilled meats. It is made with a base of vinegar and mustard, and is flavored with sugar, salt, and various spices.
Proceed as follows:
Mix the mustard, (egg yolk), vinegar, sugar salt and pepper. The egg yolk is not necessary, but will make the sauce smoother and softer.
Whisk constantly and add slowly the oil. Continue until the sauce is creamy.
Add the chopped dill.