Preheat your oven to 375°F (190°C) and lightly grease a small oven-safe baking dish.
Bring a pot of salted water to a boil and cook the ziti until just under al dente, usually about 2 minutes less than the package instructions.
In a skillet over medium heat, add the olive oil and brown the ground turkey until no pink remains, breaking it into small crumbles.
Season the turkey with garlic powder, dried oregano, sea salt, and black pepper, then stir in the fresh baby spinach until just wilted.
Pour the marinara sauce into the skillet and simmer on low for 3 minutes to allow the flavors to meld.
Drain the cooked pasta and toss it into the skillet with the turkey and sauce until every noodle is well-coated.
Transfer the pasta mixture into the prepared baking dish.
Dollop the ricotta cheese evenly over the top and sprinkle with the shredded mozzarella cheese.
Bake for 15-20 minutes until the cheese is melted and slightly golden on the edges.
Remove from the oven and garnish with freshly chopped basil before serving warm.