Smoker: 225 with your favorite wood (I used a mix of leftovers, nothing special)
Place sliced onion and bacon in smoker for 1 hour.
After 1 hour, flip bacon - remove onion
Place onion in small pan, add beer, seal with aluminum foil - return to smoker
With 5-10 minutes left, place bread slices on smoker to crisp up and add texture to bread. After an hour - remove bacon/onion from smoker.
Assemble to your liking (Bottom to top: Bread, Lettuce, Bacon, Tomato, Onion, Bread).
Enjoy!