3 lbs. roast beef
2 onions, chopped
1 clove garlic
2 tbsp. vinegar
2 tbsp. Worcestershire sauce
2 c. water
8 oz. ketchup
1 tsp. salt
1 tsp. paprika
1/2 tsp. chili powder

Mix all ingredients together; pour over roast and cook 5 hours at 300 degrees. Serve on semi-hard buns.