Bar-B-Q Beef

2 cups	beef or ham
1	chopped onion
1	chopped green pepper
6 pieces	celery, diced
2 T.	butter
2 T.	brown sugar
1 tsp.	salt
1 T.	worchestershire sauce
2 T.	mustard
3/4 cup	catsup

Cook together meat, onion, green pepper, and celery with a little water 'til tender (about 45 minutes). Add other ingredients and heat thoroughly. Serve on buns.