Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Peel the sweet potato and cut it into 1-inch cubes, and slice the carrots into 1/2-inch thick rounds.
Mince the garlic cloves finely and set aside.
Place the chicken breast, cubed sweet potatoes, and sliced carrots onto the prepared sheet pan.
Drizzle the extra virgin olive oil over the chicken and vegetables.
Sprinkle the minced garlic, dried rosemary, dried thyme, sea salt, and black pepper evenly over everything.
Use your hands or tongs to toss the vegetables and coat the chicken thoroughly in the oil and herb mixture.
Arrange the chicken in the center of the pan and spread the vegetables out in a single layer around it.
Roast for 20 to 25 minutes, or until the chicken reaches an internal temperature of 165°F and the root vegetables are tender and lightly browned.
Let the chicken rest for 5 minutes before slicing to keep it juicy, then serve alongside the roasted vegetables.