In a large pot over medium heat, add the olive oil and ground turkey, breaking it apart with a wooden spoon until browned and cooked through.
Stir in the diced onion, carrot, and celery, sautéing for 5 minutes until the vegetables begin to soften and become fragrant.
Add the minced garlic and dried thyme, cooking for an additional 60 seconds to release the aromatic oils.
Pour in the vegetable broth and the dry red lentils, stirring well to combine and scraping any browned bits from the bottom of the pot.
Bring the liquid to a gentle boil, then reduce the heat to low, cover, and simmer for 15 to 20 minutes until the lentils are tender and have softened into the broth.
Stir in the chopped kale, sea salt, and black pepper, allowing the kale to wilt in the residual heat for about 2 minutes.
Finish by stirring in the fresh lemon juice to brighten the flavors before serving in a warm bowl.