Preheat the oven to 400°F.
Peel and chop the sweet potatoes. Place them in a large baking dish. Toss with 2 tbsp olive oil, 1/2 tsp garlic powder, 1/2 tsp rosemary, salt, and pepper.
Bake the sweet potatoes for 30 minutes.
While the sweet potatoes are baking, heat 1 tbsp olive oil in a pan over medium heat. Brown the ground turkey, seasoned with 1 tsp garlic powder, 1/2 tsp rosemary, salt, and pepper.
Chop the zucchini into slices, then quarter the slices.
Remove the sweet potatoes from the oven. Add the browned ground turkey and chopped zucchini to the baking dish. Stir to combine.
Return the dish to the oven and bake for an additional 10 minutes.
Remove from the oven, drizzle with the remaining 2 tbsp olive oil, stir to combine, and sprinkle the top with shredded Parmesan cheese.
Bake for another 10 minutes or until the cheese is melted and slightly golden.
Serve warm and enjoy!