Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Mince the garlic cloves and finely chop the fresh rosemary and thyme leaves.
Peel the sweet potato and cut it into half-inch cubes, then chop the broccoli into bite-sized florets.
In a large mixing bowl, whisk together the extra virgin olive oil, minced garlic, rosemary, thyme, sea salt, and black pepper.
Add the chicken thighs, sweet potato cubes, and broccoli florets to the bowl, tossing thoroughly until everything is evenly coated in the herb oil.
Spread the chicken and vegetables in a single layer on the prepared baking sheet, ensuring they are not overcrowded to allow for proper browning.
Roast for 22 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the sweet potatoes are fork-tender.
Remove from the oven and drizzle the fresh lemon juice over the chicken and vegetables for a bright, clean finish before serving.