Frozen Blackberry Pie
["1 (8-inch) graham cracker crust", "3 egg whites", "1 c. vanilla ice cream", "1/2 c. cream cheese", "1 1/2 c. blackberries", "1 envelope unflavored gelatin", "1/2 tsp. vanilla extract", "1/2 tsp. ground cinnamon"]
["Brush crust with 1 egg white.", "Bake at 425\u00b0 until lightly browned.", "Cool completely."]
["graham cracker crust", "egg whites", "vanilla ice cream", "cream cheese", "blackberries", "unflavored gelatin", "vanilla extract", "ground cinnamon"]