Mushroom Beef Barley Soup

Ingredients

• 2 1/2 lbs stew meat, cut into small pieces
• 8 ounces mushrooms, diced
• 1 cup quick-cook barley
• 8 cups beef stock
• 1 teaspoon salt
• 1 teaspoon black pepper
• 1 1/2 teaspoons garlic powder
• 1 teaspoon onion powder
• 3 tablespoons flour
• 2 tablespoons olive oil
• 1/2 cup minced carrots
• 1/2 cup minced celery
• 1/3 cup minced onion
• 2 garlic cloves, minced
• 2 fresh rosemary sprigs
• 3 fresh thyme sprigs
• 2 bay leaves
• 2 tablespoons tomato paste
• 1 tablespoon Worcestershire sauce
• 2 tablespoons fresh parsley, chopped, plus more for garnish
• Cracked black pepper, for garnish