1 c. flour
1/2 c. walnuts, chopped
1/4 c. brown sugar
1/2 c. butter, melted

Stir and spread into shallow baking pan. Bake at 350 degrees for 20 minutes. Stirring constantly. Sprinkle 2/3 crumbs in 13 x 9 inch baking pan. Beat 2 egg whites, 2/3 cup sugar, 1 (10 ounce) package frozen berries (partially thawed), 2 tablespoons lemon juice. Beat at high speed 10 minutes until stiff. Fold in 1 cup whipped cream. Spoon over crumbs. Sprinkle remaining crumbs on top. Freeze for 6 hours.