This is a favorite at our house and is so easy to make!
1 lb ground beef
1/2 cup chopped onions (or 2T dehydrated onions)
1 cup barbecue sauce (I use Montgomery Inn brand)
1 T mustard
Brown ground beef and onions together until cooked. Drain off grease.
Add sauce and mustard and simmer for 30 minutes. Add salt and pepper to taste.
Serve on buns.