A delightful twist on the classic loose meat sandwich, perfect for a quick and satisfying meal.
Heat a cast iron skillet over medium heat and add a small amount of oil.
Using a cast iron skillet helps evenly cook the meat and enhances the flavor.
Add the ground beef to the skillet and cook while breaking it into small crumbles with a wooden spoon.
Breaking the meat into small crumbles ensures even cooking and better texture.
Add the chopped onion to the skillet and continue cooking until the onion is soft and translucent.
Cooking the onion with the meat infuses it with flavor.
Stir in the mustard, vinegar, sugar, salt, and pepper. Mix well to combine.
Adjust the seasoning to taste for a balanced flavor.
Simmer the mixture until the liquid is mostly evaporated, about 10 minutes.
Simmering allows the flavors to meld together beautifully.
Toast the hamburger buns lightly if desired.
Toasting adds a nice crunch and prevents the bun from getting soggy.
Assemble the sandwiches by placing the meat mixture on the buns and serving warm.
Serve immediately for the best taste and texture.