1 lb. ground beef
2 tbsp. mustard
1 c. ketchup
1 onion, chopped
2 cans pork 'n beans
2 tbsp. butter
2 tsp. vinegar
1/2 c. brown sugar, packed

Brown ground beef and onions in 2 tablespoons butter (drain off grease). Put in crock pot and add other ingredients. Simmer 1 hour or more.