Heat the olive oil in a large pot over medium heat.
Add the ground turkey to the pot, breaking it apart with a spoon until fully browned.
Stir in the diced onion, carrots, and celery, sautéing for 5 minutes until the vegetables begin to soften.
Add the minced garlic and dried oregano, stirring for 60 seconds until fragrant.
Pour in the chicken bone broth and add the dry red lentils, stirring to combine.
Bring the mixture to a boil, then reduce the heat to low and cover the pot.
Simmer for 15 to 20 minutes, or until the lentils are tender and have absorbed some of the liquid.
Stir in the fresh baby spinach until it is completely wilted.
Season with sea salt and black pepper before serving hot.