Grease and flour a 9-inch pie plate. Set aside.
In a large bowl, beat egg whites and cream of tartar until foamy. Beat in 1 teaspoon vanilla. Gradually beat in the 1 cup sugar until stiff peaks form (tips stand straight). Fold in crackers and pecans.
Transfer egg mixture to prepared pie plate, spreading over bottom and side. Bake in a 325 degree F oven for 35 to 40 minutes or until golden. Cool.
For filling, in a large bowl, beat cream, the 1/3 cup sugar, and 1 teaspoon vanilla until soft peaks form (tips curl). Fold in berries. Spoon into crust. Store in the refrigerator. Makes 8 servings.