Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Mince the garlic cloves and finely chop the fresh rosemary and thyme leaves.
Slice the sweet potato into even wedges and break the broccoli into bite-sized florets.
Place the chicken breast, sweet potato wedges, and broccoli florets onto the prepared sheet pan.
Drizzle the olive oil over the chicken and vegetables, then sprinkle with the minced garlic, chopped herbs, sea salt, and black pepper.
Toss the vegetables with your hands or tongs to ensure an even coating of oil and seasoning, and flip the chicken to coat both sides.
Spread everything out into a single layer, ensuring the chicken is not covered by vegetables so it browns properly.
Roast in the oven 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 ensure the juices stay locked in.