Preheat oven 425 F.
Drizzle the olive oil into the large pan, and place over medium heat.
Add the bacon in a large pan, and fry until the bacon is fully cooked. Remove from the pan.
Next add in the garlic, and cook for 1 minutes, then remove the garlic from the pan, and set aside.
Now remove the pan from the heat, and drizzle in the balsamic vinegar.
Stir the bacon dripping, and the vinegar.
Next add the brussels sprouts into a cast iron pan or baking sheet, and drizzle the bacon fat/ vinegar mixture all over the sprouts.
Toss in the garlic, sprinkle in the salt & pepper, then combine the ingredients.
Roast in the oven, uncovered for about 20 -25 minutes or until tender, but be sure to stir occasionally!
Remove from the oven, and toss in the cooked bacon.
Combine the ingredients.
Serve & enjoy!