Preheat your oven to 375°F (190°C).
In a large oven-safe skillet over medium heat, add the olive oil, diced onion, and diced red bell pepper. Sauté for 5 minutes until the vegetables begin to soften.
Add the ground turkey to the skillet, breaking it up with a wooden spoon. Cook until browned and no longer pink.
Stir in the minced garlic, dried oregano, sea salt, and black pepper, cooking for 1 minute until fragrant.
Add the rinsed chickpeas and tomato puree to the skillet. Stir well to combine and simmer for 3 minutes.
Fold in the fresh spinach and stir until just wilted.
If your skillet is not oven-safe, transfer the mixture to a small baking dish. Otherwise, keep it in the skillet.
Top the mixture evenly with the crumbled feta cheese.
Bake in the preheated oven for 15-20 minutes until the sauce is bubbling and the cheese is slightly golden.
Remove from the oven and let it rest for 5 minutes before serving.