Mustard Sauce For Ham - cooking recipe

Ingredients

1 egg, beaten
1/2 cup sugar
2 tablespoons dry mustard
1 tablespoon flour
1/2 cup apple cider vinegar
1/2 pint heavy cream

Preparation

In a double boiler (I have also just added all ingredients into a small saucepan) mix egg, sugar, dry mustard and flour. Gradually add vinegar and cream stirring constantly until it thickens.