One-Pot Chicken and Rice Soup

bone-in chicken breasts, skin removed (1 to 1 1/2 pounds)

long-grain white rice, like basmati

celery ribs, diced small

medium carrots, peeled and diced small

onion, diced small

garlic, left whole

salt, plus more to taste (see Recipe Note)

ground black pepper

unsalted or low-sodium chicken stock

Juice of 1/2 lemon (about 3 tablespoons)

Chopped fresh parsley, for serving