Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Dice the chicken breast, sweet potato, carrot, and zucchini into uniform bite-sized pieces to ensure they cook evenly.
In a large mixing bowl, combine the chicken and vegetables with the extra virgin olive oil, minced garlic, rosemary, thyme, sea salt, and black pepper.
Toss the ingredients thoroughly until everything is well-coated in the oil and aromatic herb mixture.
Spread the chicken and vegetable mixture in a single layer on the prepared baking sheet, making sure not to overcrowd the pan.
Roast in the center of the oven for 20 to 25 minutes, tossing the ingredients halfway through, until the chicken is cooked through and the sweet potatoes are golden and tender.
Remove from the oven and serve immediately while the vegetables are crisp and the chicken is juicy.