Preheat your oven to 375°F (190°C).
Cook the lasagna noodle in boiling salted water according to package directions until al dente, then drain and set aside.
In a non-stick skillet over medium-high heat, brown the ground turkey sausage until fully cooked, breaking it into small crumbles.
Stir the fresh baby spinach into the hot sausage until just wilted, then remove from heat.
In a small bowl, combine the ricotta cheese, dried oregano, garlic powder, sea salt, and black pepper.
Spread a spoonful of marinara sauce on the bottom of a small individual-sized baking dish.
Cut the cooked lasagna noodle into three equal pieces to fit the dish.
Layer one piece of noodle, followed by half of the ricotta mixture, half of the sausage and spinach, and a layer of marinara.
Repeat the layers once more, finishing with the final piece of noodle, the remaining marinara, and the shredded mozzarella.
Bake for 15-20 minutes until the cheese is melted and the sauce is bubbling.
Garnish with fresh torn basil before serving.