CRUST:

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

Mix ingredients and put into a 9"x13" pan. Bake at 350 degrees for 10 minutes stirring a couple of times. Remove and save a little for top of dessert.

FILLING:

2 c. berries
2 egg whites
1 c. sugar
1 c. whipped cream or frozen whipped topping
2 tsp. vanilla

Place berries, egg whites and sugar into a large mixing bowl and beat for 20 minutes. Fold in whipped cream and vanilla. Pour into crust and sprinkle on rest of the crumbs. Put into freezer.

This can be made ahead and frozen until served. I have used strawberries, raspberries and blackberries in this recipe.