Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Peel the sweet potato and cut into half-inch cubes, then break the broccoli into small, uniform florets.
In a small mixing bowl, whisk together the extra virgin olive oil, lemon juice, dried oregano, garlic powder, sea salt, and black pepper.
Place the skinless chicken drumsticks, sweet potato cubes, and broccoli florets onto the baking sheet.
Pour the lemon-herb dressing over the chicken and vegetables, using your hands or tongs to toss until every piece is thoroughly coated.
Arrange the ingredients in a single layer, ensuring there is space between the chicken legs for the heat to circulate.
Roast for 25 to 30 minutes until the chicken reaches an internal temperature of 165°F and the sweet potatoes are fork-tender.
Remove from the oven and sprinkle with freshly chopped parsley to add a final pop of brightness before serving.