Preheat oven to 325 degrees. Mix graham crumbs with sugar and
melted butter. Press into 9 inch plate and bake for 5 minutes.
Remove from oven and let cool. Separate 2 of the eggs, placing 2 of
the egg whites into a mixing bowl. Reserve the yolks in another
bowl. To the yolks, add 1 whole egg, lime juice, and
sweetened condensed milk. Whisk until smooth. With clean mixer
blades or a whisk attachment, beat the egg whites with the salt and
cream of tarter, until stiff but not dry. Fold whites into filling
mixture. Pour filling into partially baked crust. Bake in
preheated 325 degree oven for 10 to 15 minutes or until set.
Let cool to room temperature and then freeze for 4 hours or
overnight. Just before serving, whip cream to form stiff peaks.
Serve decorated with whipped cream and lime slices.