Barbecue - cooking recipe

Ingredients

3 lb. lean beef roast
3/4 c. brown sugar
1/4 c. white vinegar
1 (16 oz.) ketchup or more

Preparation

Put meat in crock-pot.
Cook until tender enough to whip apart with a fork.
Add other ingredients and turn on low.
Cook about 1 hour.
Stir often.