1 c. flour
1/4 c. brown sugar
1/2 c. nuts, chopped
1 stick butter, melted
1 c. butter
2 egg whites
1 c. white sugar
2 c. strawberries, sliced
2 tbsp. lemon juice

Stir together first 4 ingredients and spread evenly in a shallow pan. Bake at 350 degrees for 20 minutes, stirring occasionally. Sprinkle 2/3 of crumbs in a 13 x 9 x 2 inch baking pan. Combine egg whites, sugar, strawberries and lemon juice in a bowl with a mixer. Beat at high speed to stiff peaks. Fold in Cool Whip. Spoon over crumbs. Top with remaining crumbs. Freeze 6 hours or overnight. Cut into squares.