1/4 c. oil
2 tbsp. sugar
2 tbsp. lemon juice
1 tsp. paprika
Pinch of dry mustard
1 egg yolk
1 pt. sour cream
2 tbsp. cornstarch
1/2 c. water

In a saucepan, add 1/2 cup water and cornstarch. Heat until it thickens. In a bowl, add first 6 ingredients; beat in cornstarch and water. Beat until smooth. Add sour cream to mixture. Makes enough dressing for 2 1/2 pounds of potatoes.