Spray a baking sheet with nonstick spray or line with parchment paper.
In a medium bowl, combine egg substitute, brown sugar, butter, vanilla extract, cinnamon and salt. Mix well.
Stir in 1 tablespoon chopped pecans and 1 tablespoon chopped walnuts into mixture. Arrange shells and evenly distribute the mixture evenly among the fillo shells.
Combine remaining nuts and sprinkle them on the top of the shells (a little less than 1/2 teaspoon per shell).
Bake in the oven until edges are crips, 15-18 minutes.
Allow to cool slightly before serving. If you like, top each piece with a squirt of fat free whipped cream topping. Enjoy!
Note: nutritional information does not include optional fat free whipped topping.