Red pepper sloppy joes

1/2 pound ground beef
1 Tbsp brown sugar
1 small onion, finely chopped
1/4 red bell pepper, finely chopped
1 tsp vinegar
1 tsp Worcestershire sauce
3/4 to one cup tomato purée
salt and pepper to taste
2 toasted buns

Brown ground beef in a skillet over medium high heat. Drain off fat. Reduce heat to medium and cook onions, peppers, sugar, vinegar and Worcestershire sauce with meat for five minutes. Add tomato purée and stir. Reduce heat to simmer and cook five minutes longer. Add salt and pepper to taste. Serve over toasted buns.