Topping ideas:
ketchup, mustard, pickles, onions
Instructions:
In a skillet, brown and crumble the ground beef with the onion and salt over medium-high heat until the meat is no longer pink. Be sure to make the crumbles small as it cooks. Drain any fat, if necessary.
Add the mustard, vinegar, and sugar to the beef mixture. Add enough water to just cover the meat. Bring the mixture to a boil. Reduce the heat to medium-low heat and continue to cook uncovered, stirring occasionally, until most of the water has evaporated. Taste and then season with additional salt and pepper to taste.
Serve the meat mixture on steamed buns with desired toppings.
