Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Peel and dice the sweet potato into 1-inch cubes, slice the carrots into rounds, and trim and halve the Brussels sprouts.
In a mixing bowl, toss the prepared vegetables with 0.5 tablespoon of olive oil, half of the minced garlic, sea salt, and black pepper.
Spread the vegetables in a single layer on one side of the prepared baking sheet.
Pat the chicken breast dry with a paper towel and rub with the remaining 0.25 tablespoon of olive oil, the rest of the garlic, chopped rosemary, and thyme.
Place the chicken breast on the other side of the baking sheet.
Roast for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are fork-tender and slightly browned.
Remove from the oven and let the chicken rest for 5 minutes before slicing to ensure it stays moist and flavorful.