This is the recipe I have used for years.
Rich tomato sauce coats savory protein chunks while sharp vinegar cuts through the rendered fat of the beef. Balanced sweetness from brown sugar rounds out the aggressive acidity of the canned soup base.
Pair these heavy meat sandwiches with crisp coleslaw or raw vegetable crudités. High-acid crunchy sides provide essential textural contrast against the soft buns and dense protein filling.