Heat the extra virgin olive oil in a large heavy-bottomed pot over medium heat.
Add the ground turkey to the pot and cook until browned, using a wooden spoon to break the meat into small crumbles.
Stir in the diced yellow onion, sliced carrots, and sliced celery, and sauté for about 5 minutes until the vegetables begin to soften.
Add the minced garlic and dried thyme, stirring constantly for 1 minute until the mixture becomes fragrant.
Pour in the low-sodium vegetable broth and stir in the dry brown lentils, scraping any browned bits from the bottom of the pot.
Increase the heat to bring the liquid to a gentle boil, then immediately reduce the heat to low and cover the pot with a lid.
Simmer the soup for 20 to 25 minutes, or until the lentils are tender but still hold their shape.
Remove the lid and stir in the chopped kale, allowing it to cook for 2 to 3 minutes until it is vibrant green and wilted.
Turn off the heat and stir in the fresh lemon juice, sea salt, and black pepper before serving in deep bowls.