Place the cookies into the bowl of a food processor and pulse a few times to break them up then process until the cookies become crumbs. Add the melted dairy free butter substitute and process to combine. Spray a 9 inch spring-form pan well with gluten-free non-stick cooking spray. Firmly press the crumb mixture into the pan, evenly covering the bottom and about halfway up the sides. Refrigerate crust while preparing the filling.

Place the sugar and egg whites in the heat-proof bowl of an electric mixture and place over a pan of barely simmering water. Stir constantly until the sugar has all dissolved and the egg whites are warm to the touch, about 3 minutes. Attach the bowl to the mixer and using the whisk attachment beat the egg whites on medium speed until soft peaks form, about 3 minutes. Raise the speed to high and beat until stiff peaks form but the mixture is not dry - about 1 ½ minutes.

Mound the meringue over the top of the pie and using a knife or spatula create little peaks. Place the pie under the broiler for a few seconds to brown the top or use a kitchen torch. Be careful not to burn the meringue. Serve the pie right away or refrigerate until serving time.