Preheat your oven to 375°F (190°C).
Bring a pot of salted water to a boil and cook the lasagna noodles until al dente, then drain and set aside.
In a non-stick skillet over medium heat, cook the ground turkey with minced garlic, sea salt, black pepper, and dried oregano until browned and cooked through.
Stir the marinara sauce into the cooked turkey and let it simmer for 2 minutes to meld the flavors.
In a small bowl, finely chop the fresh baby spinach and stir it into the ricotta cheese until well combined.
In a small individual baking dish, spread a thin layer of the meat sauce on the bottom.
Layer with half a noodle (cut to fit), followed by half of the ricotta-spinach mixture and a sprinkle of mozzarella.
Repeat the layers, finishing with the remaining meat sauce, mozzarella, and a final dusting of grated parmesan cheese.
Bake for 20-25 minutes until the cheese is bubbling and the edges are slightly browned.
Let the lasagna rest for 5 minutes before serving to allow the layers to set.