Famous Maid-Rite Loosemeat Sandwiches

From Iowa to Ohio, the Maid-Rite sandwich has
been described as a sloppy-joe without ketchup.
This makes for one fine sandwich on a bun.
I like to put a slice of chedder in it too.

Ingredients:
1 pound ground beef 85/15
1 medium onion, peeled and chopped
1 tablespoons white vinegar
1 tablespoons brown sugar
2 teaspoons prepared yellow mustard
2 teaspoons ground allspice
salt and pepper to taste
6 hamburger buns

Directions:
Place ground beef in a large skillet over medium-high heat.
Add onion; cook and stir until meat is no longer pink.
Drain excess grease, and stir in the vinegar,
brown sugar, allspice, mustard, ketchup, salt and pepper.
Simmer over medium heat for about 15 minutes. Serve on buns.