Heat the extra virgin olive oil in a large pot over medium heat.
Add the diced yellow onion, carrots, and celery, sautéing for 6-8 minutes until the vegetables are softened and fragrant.
Stir in the minced garlic, fresh thyme, and fresh rosemary, cooking for an additional 60 seconds to release the aromatic oils.
Pour in the low-sodium chicken broth and bring the liquid to a gentle simmer.
Carefully place the whole chicken breast into the simmering broth, cover the pot, and poach for 12-15 minutes until the internal temperature reaches 165°F.
Remove the chicken to a cutting board and shred it using two forks, then return the shredded meat back to the pot.
Add the chopped lacinato kale and fresh lemon juice, stirring for 2 minutes until the greens are vibrant and tender.
Season the soup with sea salt and black pepper before ladling into a deep bowl.