Oven Barbecue

OVEN BARBECUE
The meat in this dish can be cooked the day before and reheated. Buy some slaw at the deli to go along, and put out olives and pickles.

1 bone-in or boneless beef chuck roast, about 5 pounds
Salt and pepper, to taste
1 large onion, chopped
3 cups ketchup
1 teaspoon Worcestershire sauce
2 cups water
2 tablespoons cornstarch
1 tablespoon chili powder
1 teaspoon paprika
1/4 teaspoon black pepper
1/4 cup cider vinegar
1/2 cup firmly packed brown sugar
1/2 teaspoon ground allspice (optional)
12 to 15 hamburger buns

Preheat oven to 325 degrees.

Place roast in baking pan, sprinkle with salt and pepper and roast, uncovered, 2 hours. Let set 30 minutes, then slice fairly thin.

Make a sauce by mixing together the onion, ketchup, Worcestershire sauce, water, cornstarch, chili powder, paprika, pepper, vinegar, brown sugar and allspice. Return meat to roasting pan, layering with the sauce. Cover tightly with lid or foil and roast at 325 degrees another 3 hours. Keep warm until serving time at 250 degrees.