Mushroom Barley Soup

Bahan-bahan (4 porsi)

• 1 tablespoon butter
• 1 onion (diced)
• 1 carrot (diced)
• 1 rib celery (chopped)
• 8 ounces mushrooms (sliced or 1 can mushrooms)
• 6 cups beef broth (or vegetable broth)
• ⅔ cup pearl barley
• 1 bay leaf
• 1 ½ teaspoons Worcestershire sauce
• 1 teaspoon soy sauce
• ¼ teaspoon dried thyme leaves