Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper.
Dice the sweet potato into 1/2-inch cubes and chop the broccoli into bite-sized florets.
Mince the garlic cloves finely.
In a large mixing bowl, combine the chicken breast, diced sweet potatoes, and broccoli florets.
Drizzle with olive oil and sprinkle with minced garlic, rosemary, thyme, sea salt, and black pepper, tossing well to ensure everything is evenly coated.
Spread the mixture in a single layer on the prepared baking sheet, ensuring the chicken is not crowded by the vegetables.
Roast for 20 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 let the chicken rest for 5 minutes before slicing to keep it juicy.