Starz' Mom's Fantastic BBQ Beef

Submitted by Starscr292

1/4 c. vinegar
1-1/2 c. water
1/4 c. sugar
4 tea. prepared mustard
1/4 tea. black pepper
1/4 tea. Cayenne powder
1 Tbl. salt
1 Tbl. lemon juice
2 med onions, sliced
1/2 c. margarine or butter
1 c. catsup
3 Tbl. Worcestershire sauce
4 c. cooked, shredded chuck, or other inexpensive, roast

Combine vinegar, water, sugar, mustard, pepper, Cayenne, salt, lemon juice, onion and butter.  Simmer uncovered 20 minutes.  Add catsup, Worcestershire sauce and beef.  Simmer 45 minutes.