Preheat oven to 350°F. Grease a 9-inch square baking pan.
Mix cookie crumbs and butter together in a medium bowl. Press into the bottom of prepared baking pan.
Bake for 8 minutes. Remove from oven and let cool.
Add egg whites and lemon juice to a large bowl. Beat with a mixer until combined and fluffy. Gradually add in sugar and strawberries. Continue to beat until fluffy and has large volume.
Fold in whipped cream. Spread mixture over cookie crust. Cover and freeze overnight.
When ready to serve, cut into squares. Garnish with fresh strawberries, if desired.