Short Rib Bourguignon

Name: Short Rib Bourguignon
Ingredients: 5 pounds trimmed boneless beef short ribs, cut into 2 1/2-inch pieces; 9 carrots—5 cut into 2-inch pieces, 4 cut into 1-inch rounds; 5 celery ribs, cut into 2-inch pieces; 5 medium onions, quartered; 10 garlic cloves; One 750-milliliter bottle dry red wine; Salt; Freshly ground pepper; 1/4 cup extra-virgin olive oil; 6 cups beef stock; 1 pound meaty slab bacon—half cut into 1/4-inch-thick lardons, half cut into 2-inch pieces; 3 bay leaves tied with 15 thyme sprigs; 2 pounds stemmed button mushrooms; Chopped flat-leaf parsley, for garnish