For the Maple-Pecan Orgeat:
Blend the pecans with one quart of hot water in the Vitamix Quiet One blender until completely emulsified. Strain though a fine chinoise to get a "pecan milk". This should yield 3 cups of pecan milk.
Add the pecan milk, sugar, and maple syrup to a pot and bring to a simmer. Stir well until the sugar is melted and all of the ingredients are incorporated. Add orange flower water and bourbon to stabilize the syrup. Let cool and bottle. Will last refrigerated for up to one month. Shake well before each use.
To Assemble and Serve:
Shake bourbon, orangerie, ¾ ounce Maple-Pecan Orgeat, and lemon juice. Strain into a coupe class and garnish with orange peel.