Preparation:

1. Fry the bacon in a skillet over medium-high heat, until rendered and crispy.
2. Take the bacon out of the pan (set aside until needed). Reserve / save bacon fat.
3. Add the brussels sprouts to the pan, stir them until they're nicely coated in the bacon grease, and cover the pan with a lid. Cook for approximately 5 minutes.
4. Add the bacon back into the pan. Deglaze with sherry vinegar. Continue to cook (uncovered) to desired color / doneness.
5. Season with salt & pepper if needed.
6. Serve immediately.