Strawberry Chantilly

Directions

1. 1
   Preheat oven to 300 degrees F (150 degrees C).
2. 2
   Mix flour, sugar and butter until crumbly. Stir in chopped walnuts.
3. 3
   Press two-thirds of the mixture in the bottom of a 9x13-inch baking dish; the remaining crumble will be used for the topping. Bake in preheated oven for 20 minutes. Cool crust completely.
4. 4
   In large deep bowl, stir together egg whites, sugar (see Cook's Note), strawberries, and lemon juice. Whip with electric mixer at high speed for 10 minutes.
5. 5
   In another mixing bowl, whip whipping cream until stiff and fold into strawberry mixture. Spread over cooled crust. Sprinkle with remaining crumb mixture. Freeze for 6 hours or overnight before serving.