Inspired by Maid-Rite in Iowa, Loose Meat Sandwiches are simple yet so very delicious. Make a batch in 10 minutes or less! Also slow cooker friendly.
In a large skillet, combine beef, water, mustard, sugar, 1 teaspoon salt, and 1 teaspoon pepper. Simmer over medium heat until the beef is cooked through, about 5 minutes, breaking up clumps of meat with a spoon. Stir in onion.
Serve meat on buns with toppings on the side such as ketchup, mustard, mayonnaise, and pickles.