4 lbs. roast
2 tbsp. vinegar
1 reg. size bottle of ketchup
4 c. chopped celery
3 sliced onions
1 tbsp. salt
2 tbsp. Worcestershire sauce
1 tsp. chili powder
2 c. water

Place all ingredients in a roaster and bake in a slow oven (300-325 degrees) for about 5 hours. Break meat apart with a fork as it cooks. Add more water as needed.