Beat the egg white with a whisk until it is frothy; add the maple syrup and bourbon and continue whisking for another minute.
Add the walnuts to the bowl and coat well. Add the spices to the walnut mixture and mix until well blended.
Pour walnuts on a layer of parchment paper on a baking sheet.
Bake for 15 minutes, stirring the walnuts every 5 minutes. After 15 minutes; add the crisp bacon and cook for an additional 5 minutes. Test a walnut to make sure it's fully roasted and crunchy; if not, continue to bake for another 2-3 minutes.
As soon as they’re done, remove from oven and spoon them onto a new sheet of parchment or waxed paper. Allow the mixture to cool. If some pieces stick together break them apart once they’re cooled!
Best served the day they are made but then...I don't know how you would have any left. :)