Heat the extra virgin olive oil in a large heavy-bottomed pot over medium heat.
Add the diced yellow onion, carrots, and celery to the pot and sauté for 5 to 7 minutes until the vegetables are softened and translucent.
Stir in the minced garlic, dried thyme, sea salt, and black pepper, cooking for 1 minute until the spices are fragrant.
Pour in the chicken broth and add the dry brown lentils along with the whole chicken breast.
Bring the soup to a gentle boil, then reduce the heat to low, cover, and simmer for 25 minutes or until the lentils are tender.
Carefully remove the chicken breast from the pot, shred it using two forks on a cutting board, and return the shredded meat to the soup.
Stir in the chopped lacinato kale and simmer for an additional 2 minutes until the greens are wilted and bright green before serving.