Preheat your oven to 400°F and line a large sheet pan with parchment paper for easy cleanup.
Wash and peel the sweet potato, then dice it into 1/2-inch cubes to ensure it roasts evenly with the other components.
Chop the broccoli into bite-sized florets and slice the red bell pepper into 1-inch pieces.
Cut the chicken breast into uniform 1-inch cubes and mince the fresh garlic clove.
In a large mixing bowl, combine the chicken, sweet potato, broccoli, and bell pepper.
Drizzle with olive oil and sprinkle the rosemary, thyme, sea salt, black pepper, and minced garlic over the top.
Toss everything thoroughly until the chicken and vegetables are well-coated in the oil and herbs.
Spread the mixture in a single layer on the prepared baking sheet, ensuring nothing is overcrowded.
Roast for 20 to 25 minutes, tossing halfway through, until the chicken is cooked through and the sweet potatoes are tender with caramelized edges.