Beef with vinegar

2 tablespoons olive oil 1 1/2 lbs beef stew meat 10 cups water 4 large carrots , peeled and diced 4 stalks celery , diced 1 onion , chopped 2 cups frozen[...]

1 (5 pound) beef brisket salt and pepper to taste 1/4 cup Merlot wine 1/4 cup balsamic vinegar 1/2 cup beef stock 1 (15 ounce) can stewed tomatoes 1 large[...]