1 lb. young, tender string beans
2 egg yolks
1 tbsp. raspberry vinegar
1/2 tsp. sugar
Pinch nutmeg
Pinch salt

In a small saucepan combine above ingredients (except beans and sour cream); whisk briefly over hot water until thickened and fluffy. Beat in sour cream. Pour over crisply cooked beans. Serves 4-6.