Roast Beef with worcestershire

3 large onions , sliced thin 1 (1 lb) can Tomato , crushed and drained in a sieve 2 tablespoons olive oil 3 lbs tied boneless beef rib roast, at room[...]

3 large onions , sliced thin 1 (1 lb) can tomato , crushed and drained in a sieve 2 tablespoons olive oil 3 lbs tied boneless beef rib roast, at room[...]