Blueberry Bars - cooking recipe

Ingredients

2 c. self-rising flour
1 1/2 c. sugar
2/3 c. margarine
2 egg yolks, unbeaten (reserve whites)
1 c. milk
1 c. blueberries, drained (fresh, frozen or canned)
1 c. nuts, chopped

Preparation

Place flour and sugar in large mixing bowl.
Cut in margarine until size of small peas.
Measure 3/4 cup of mixture and reserve for crumb topping.
Add unbeaten egg yolks and 1 cup milk to remaining crumb mixture in bowl.
Beat for 3 minutes until well blended (electric mixer at low).
Beat 2 egg whites until stiff, but not dry.
Fold gently, but thoroughly, into batter.