01 - Preheat oven to 400°F. Lightly grease a 9x13-inch casserole dish with cooking spray or a small amount of oil.
02 - Heat 1 tbsp olive oil in a large skillet over medium heat. Add ground turkey and cook until browned, breaking apart with a spoon for 5–7 minutes. Season with salt, pepper, thyme, smoked paprika, and cumin. Transfer to a plate and set aside.
03 - Add remaining 1 tbsp olive oil to the same skillet. Cook onion and red bell pepper until softened, about 5 minutes. Add garlic and cook for 1 minute until fragrant.
04 - Stir in diced sweet potatoes and cook for 5 minutes, stirring occasionally. Add chopped spinach and cook until wilted, about 2 minutes.
05 - Return browned turkey to the skillet with vegetables. Pour in chicken broth and mix well. Simmer for 3–4 minutes until liquid slightly thickens.
06 - Transfer mixture to the prepared casserole dish. Top evenly with shredded mozzarella and Parmesan cheese.
07 - Cover dish with aluminum foil and bake for 25 minutes.
08 - Remove foil and bake for an additional 10–15 minutes, until sweet potatoes are tender and cheese is golden and bubbly. Let cool for 10 minutes before serving.