01 - Preheat the oven to 400°F.
02 - In a large skillet, heat 1 tablespoon olive oil over medium heat. Add the onion and garlic; sauté for 2-3 minutes until fragrant.
03 - Add ground turkey. Cook, breaking it up with a spoon, until browned and cooked through, about 5-7 minutes. Season with smoked paprika, thyme, cumin, chili powder, salt, and pepper.
04 - Stir in the diced bell pepper and cook for 2 minutes. Add the chopped spinach and cook until wilted, about 1 minute. Remove from heat.
05 - In a large mixing bowl, toss diced sweet potatoes with remaining 1 tablespoon olive oil and a pinch of salt and pepper.
06 - Lightly grease a 9x13-inch baking dish. Spread the sweet potatoes in an even layer on the bottom.
07 - Spoon the turkey and vegetable mixture evenly over the sweet potatoes. Pour the chicken broth evenly over the top.
08 - Cover tightly with foil and bake for 25 minutes.
09 - Remove foil, sprinkle with cheddar cheese if using, and bake uncovered for an additional 15 minutes, or until the sweet potatoes are tender and the cheese is melted and bubbly.
10 - Let rest for 5 minutes before garnishing with chopped parsley and serving.