traditional spaghetti bolognese

INGREDIENTS

• 1 ounce butter
• 1 tablespoon olive oil
• 1 carrot
• 2 stalks celery
• 1 onion
• 4 ounces streaky bacon
• 1 lb hamburger or 1 lb ground beef
• 1 (14 ounce) can chopped Tomatoes
• 2 bay leaves
• salt
• fresh ground black pepper
• 2 cloves chopped garlic
• 4 ounces mushrooms
• 1/4 pint beef stock
• 1 glass red wine
• 2 tablespoons double cream
• 3/4 tablespoon tomato puree
• thyme
• oregano