Katie's Favorite Sloppy Joes

My wife Katie is not a fan of sloppy Joes, but these ones she enjoys.    Here it is!

2 lbs ground beef
1 large onion, chopped
1 1/4 cups ketchup
1/2 cup water
1 Tbsp brown sugar
1 Tbsp white vinegar
1/2 tsp salt
1/2 tsp ground mustard
1/2 tsp chili powder
1/4 tsp ground allspice
8 sandwich buns, split

MAKES 8 SERVINGS

1. In a large pan, cook beef and onion over medium heat until meat is no longer pink.  Drain.
2. Add the ketchup, water, brown sugar, vinegar, salt, mustard, chili powder, and allspice.
3. Bring to a boil. Reduce heat; simmer, uncovered, for 35-40 minutes.
4. Spoon over buns for either open-faced or closed sandwiches.  Enjoy!