Prepare the brussel sprouts by cutting off the ends. Cut the sprouts in half lengthwise.
Lay them flat side down and thinly slice each half. Use your hands to pull apart the sprout into thin “strips”. Set aside.
In a skillet over MED heat, add the avocado oil. Sauté the onions and bacon until soft and fragrant. The fat should be rendering from the bacon. Do not over cook the bacon. It should still be chewy.
Add the brussel sprouts and sauce until tender.
Add sugar free maple syrup, red wine vinegar, brown sugar substitute, salt, and water to the skillet. Reduce the heat to LOW and let the mixture simmer until the sauce is reduced and there is no more liquid in the pan. This should take several minutes. Stir occasionally to prevent burning.