Boeuf Bourguignon

Name: Boeuf Bourguignon
Ingredients: 1 kilogram lean Beef (such as from the shoulder); 2 Carrots; 1 stalk Celery; 2 Onions; 2 Garlic cloves; 4 tablespoons Vegetable oil; 2 tablespoons Tomato paste; ½ liter strong Red wine (such as Burgundy); 2 Bay leaves; 500 milliliters Beef stock (or vegetable broth); 130 grams Bacon; 300 grams Chestnut mushroom; 1 tablespoon Butter; Salt; freshly ground Pepper