Heat the olive oil in a large pot over medium heat.
Add the ground turkey to the pot and cook until browned, using a wooden spoon to break it into small crumbles.
Stir in the diced onion, carrots, and celery, and sauté for 5-6 minutes until the vegetables begin to soften.
Add the minced garlic, dried thyme, sea salt, and black pepper, stirring for 1 minute until highly fragrant.
Pour in the dry green lentils and vegetable broth, then bring the mixture to a gentle boil.
Reduce the heat to low, cover the pot, and simmer for 25 to 30 minutes until the lentils are tender but not mushy.
Stir in the chopped kale and cook for an additional 3-5 minutes until the leaves are wilted and bright green.
Ladle the stew into a bowl and serve hot.