Horseradish Sauce - cooking recipe

Ingredients

3 tablespoons butter
1 teaspoon flour
1/4 cup vinegar
1/4 cup beef broth
1/4 cup horseradish mustard, prepared
3 tablespoons brown sugar
1 egg yolk, slightly beaten

Preparation

Melt butter; blend in flour.
Add vinegar, beef broth, prepared horseradish mustard, and .
brown sugar.
Cook slowly, stirring constantly, till thick.
Gradually add a little hot mixture to 1 slightly beaten egg yolk.
Return to hot mixture. Bring sauce to boiling, stirring constantly.
Serve hot with corned beef or ham.
Makes 1 cup.