Empty Sauerkraut into a pot and heat on medium low. Slice the onion into thin onion rings. While the sauerkraut is heating up cook the bacon in a small skillet. Once the bacon is cooked place them on paper towels to absorb the excess grease. DO NOT throw out the grease in the skillet. Put the onion rings into the skillet, cook until lightly brown and caramelized. Grill the hot dogs, or reuse the bacon grease skillet. Cut the bacon and hot dog into bite sized pieces. Place all ingredients into a large bowl and toss --Optional, try adding 2Tbsp of relish in the bowl or sprinkle on servings.