Sloppy Joes

Sloppy Joes 

3 1/2 lbs. Hamburger 

1/2 c. chopped onions 

2 cups celery (optional)

2 cups carrots (optional)

1/3 cup vinegar

1/4 cup brown sugar 

1 TB dry mustard 

1 TB salt 

1/2 cup water 

2 1/2 cup ketchup