Preheat oven to 350F. Roll pastry out to fit a 9-inch pie pan and transfer to pan leaving about 1 inch of overhang. Fold edges under and crimp edges.
Arrange pecan halves in bottom of pie shell and sprinkle dark chocolate chunks over top. Chill pie crust in refrigerator or freezer while preparing the filling.
In a large bowl, whisk eggs until smooth. Whisk in corn syrup, sugar, bourbon, melted butter, vanilla, salt, nutmeg, and cinnamon until smooth.
Remove pie crust from refrigerator or freezer and place on a sheet pan. Carefully pour filling over pecans/dark chocolate. Top with flaky salt if desired.
Bake pie at 350F 50-60 minutes until filling is set and crust is golden brown (cover the crust edges with a pie shield or tin foil if it browns too fast).
Allow pie to cool completely on a wire cooling rack. Once cooled, cut into slices and serve with whipped cream on top if desired. Enjoy!