Light and airy, this pumpkin chiffon pie is full of the flavors you love in a pumpkin pie, but won't weigh you down. A nutty graham cracker crust and a light pumpkin filling, it's perfect after a holiday meal, or any autumn night. Just add a dollop of whipped cream with a dash of cinnamon or crushed candied pecans on the top.More than half of the fat comes from the pecans in the crust, which are full of healthy unsaturated fats.
Place graham crackers, pecans, and sugar in the bowl of a food processor and process until the mixture forms crumbs.
Add the melted butter and process until the mixture holds together. Add the cinnamon and process quickly.
Pat the mixture into a 9-inch pie pan, covering the bottom and up the sides.
Place in the middle of the preheated oven and bake for 10 minutes.
Remove from the oven and allow to cool.
Make Pie Filling
Whisk the egg yolks, milk, water, and 6 tbsp of maple syrup in a medium saucepan. Sprinkle gelatin on top and whisk until gelatin dissolves. Gently heat the mixture over low to medium-low heat, whisking constantly for 10 - 15 minutes, until it has thickened slightly. (The whisk should leave rows when pulled through the mixture)
Place the pumpkin puree and spices in a large bowl and combine. Whisk in the thickened egg and milk mixture. Allow it to cool for 30 minutes, stirring occasionally.
In another large bowl, whip the egg whites to soft peaks. (About 2 minutes on high.) While the beaters are on, drizzle in the last 2 tablespoons of maple syrup and the bourbon and continue beating until glossy.
Once the pumpkin mixture has cooled, gently fold in the egg whites. Take your time and lift the pumpkin mixture over the egg whites like you are gently folding a sheet. You want a light and airy texture, and the egg whites will give this structure and airiness.
Once combined, pour the pumpkin chiffon into the prepared and cooled crust. Place the pie, uncovered in the refrigerator for at least 4 hours but up to 24 hours.