Apple Pie

Crust:
1/3 cup rolled oats
6 graham crackers
2 tablespoons chopped walnuts
1 egg white
Buttered flavored vegetable cooking spray

Filling:
2 cups apple cider
1/2 cup sugar
2 tablespoons fresh lemon juice
2 teaspoons vanilla extract
1 1/4 teaspoon pumpkin pie spice
5−6 large Granny Smith apples, about 2 1/2 pounds
3 tablespoons cornstarch