My mom used to bring this to our church potlucks 20 years ago. The sour taste from the sauerkraut bakes out of the dish, to give it a more sweet BBQ flavor. Serve over smashed boiled potatoes.
For enhanced depth, consider adding a teaspoon of smoked paprika and a dash of Worcestershire sauce to the ground beef as it browns. Ensuring the beef is well-caramelized and the sauerkraut thoroughly drained is key to preventing a watery casserole. If you prefer a less sweet profile, reduce the brown sugar by a quarter cup and consider a tablespoon of apple cider vinegar for a bright tang. To elevate presentation, a sprinkle of fresh chopped parsley or chives after baking adds vibrant color. Monitor baking closely; while the sauce needs to bubble, excessive baking can dry out the beef. Serving with a side of creamy mashed or smashed potatoes provides an excellent textural contrast to the savory-sweet casserole.