The bacon jam can be made the same day as the potatoes, or a few days ahead.
Cut the bacon into small pieces and add to a frying pan over medium heat. Cook the bacon down until it is browned, about 5 minutes. Take the bacon out of the pan, but leave about 2 tbsp of bacon grease behind.
Add the onion into the pan with the grease and cook until the onions are translucent, about 5 minutes. Turn the heat to low and aadd the balsamic vinegar to deglaze the pan. Then add the remaining ingredients -- maple syrup, brown sugar, garlic, apple cider vinegar. Cook until the liquid has thickened, about 8-10 minutes.
When the consistency is jam-like, take the pan off the heat. Add the jam to a food processor or blender and pulse until the mixture is the consistency you desire. (It will be really chunky at first, I wanted mine to have smaller chunks).
Store in a sealed container in the fridge for up to a week!