4 tbsp. butter
1 c. brown sugar
2 c. rhubarb
2 egg yolks, beaten
3 tbsp. water
1/2 tsp. vanilla
1 c. flour
1 tsp. baking powder
1/2 tsp. salt
2 egg whites, beaten

Melt butter in a deep pan; add rhubarb, which has been cut in small pieces. Sprinkle brown sugar over rhubarb. Beat egg yolks, water and sugar. Add sifted dry ingredients; add vanilla and stiffly beaten egg whites. Pour over rhubarb and bake in moderate oven 45 minutes. Serve with milk or cream.