These are loose meat sandwiches that aren't like your regular old sloppy joes. And they are super easy!
In a medium skillet over medium-high heat, brown ground beef and drain.
Return ground beef to skillet and sprinkle in 2 to 3 tablespoons flour.
Add onion soup, stir, and cook until meat mixture is thickened and most of the liquid is absorbed.
Spread mustard on white bread, spoon ground beef mixture onto bread and top with onion.
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