1. Combine egg whites, bananas, sugar, vanilla, and lemon juice in a mixing bowl. Mix on high speed for 8-10 minutes until volume increases.
2. Fold in crumbled cookies, chopped nuts and chocolate chips, if desired.
Variations: For a richer ice cream, fold in 1 container of dessert topping, whipped.
Note: I prepare this ice cream the following way. I whip the eggs whites, and set aside. Then I whip the whipping cream (Rich's parve), and set aside. Then I mash the bananas, and mix them with the sugar, vanilla and lemon juice. Finally I gently fold together the eggs whites, whipped cream and bananas. We add in cookies only.