Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper for easy cleanup.
Peel the sweet potato and cut it into 1/2-inch cubes, then chop the broccoli into bite-sized florets.
Mince the garlic cloves finely and set them aside.
In a large mixing bowl, combine the chicken breast, sweet potato cubes, and broccoli florets.
Drizzle with extra virgin olive oil and sprinkle with minced garlic, rosemary, thyme, sea salt, and black pepper.
Toss everything thoroughly until the chicken and vegetables are evenly coated in the oil and seasonings.
Spread the mixture in a single layer on the prepared baking sheet, ensuring the chicken pieces are not crowded.
Roast for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the sweet potatoes are tender when pierced with a fork.
Remove from the oven and let the chicken rest for 5 minutes before slicing to keep it juicy.