Fluffy Mustard Sauce
["2 egg yolks, beaten", "3 Tbsp. prepared mustard", "1 Tbsp. water", "1 Tbsp. butter", "1/2 c. whipping cream, whipped", "1 Tbsp. sugar", "2 Tbsp. vinegar", "3/4 tsp. salt", "1 Tbsp. prepared horseradish"]
["Place eggs in a bowl and add sugar, mustard, vinegar, water and salt.", "Mix well.", "Pour mixture into a double boiler and cook, stirring constantly, until mixture thickens, about 4 to 5 minutes. Remove from heat. Blend in butter and horseradish. Cool thoroughly. Fold in whipped cream. Serve with warm meat.", "Remove from refrigerator 30 minutes before serving."]
["egg yolks", "mustard", "water", "butter", "whipping cream", "sugar", "vinegar", "salt", "horseradish"]