Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Peel the sweet potato and cut it into small 1/2-inch cubes to ensure they cook at the same rate as the turkey.
Chop the broccoli into small, bite-sized florets, removing any thick woody stems.
Place the ground turkey, sweet potato cubes, and broccoli florets onto the prepared baking sheet.
Drizzle the olive oil over the ingredients and sprinkle evenly with sea salt, black pepper, garlic powder, and dried rosemary.
Use clean hands or a spatula to toss everything together, breaking the turkey into small chunks and ensuring the vegetables are well-coated.
Spread the mixture into a single even layer across the pan to promote browning rather than steaming.
Roast in the oven for 20 to 25 minutes, tossing the mixture halfway through, until the turkey is fully cooked and the sweet potatoes are fork-tender.
Remove from the oven and serve immediately while the herbs are fragrant and the edges are slightly crisp.