Add diced onion, carrots, and celery. Sauté until vegetables are tender, about 5 minutes.
Stir in minced garlic and cook for an additional minute.
Pour in chicken broth and add shredded chicken, pearl barley, and bay leaves.
Bring the soup to a boil, then reduce heat and let it simmer for 30-40 minutes until barley is tender.
Remove bay leaves and discard.
Stir in lemon juice and season with salt and pepper to taste.
Ladle the soup into bowls, garnish with fresh parsley, and serve hot.
Notes
Feel free to adjust the acidity of the soup by adding more or less lemon juice according to your preference. This recipe is incredibly versatile, so don't hesitate to get creative with it!