BEEF ROAST POT !!!

1 beef chuck or bottom round roast, about 3 1/4 pounds
1/2 teaspoon salt
1/8 teaspoon black pepper
1/2 teaspoon dried thyme
1 onion, chopped
3 carrots, chopped
3 ribs celery, chopped
3 cloves garlic, chopped
2 cups unsalted beef stock
2/3 cup balsamic vinegar

DIRECTIONS