Preheat your oven to 400°F (200°C) and line a large rimmed sheet pan with parchment paper for easy cleanup.
Peel the sweet potato and cut it into 1/2-inch cubes, then chop the broccoli into bite-sized florets.
In a small bowl, whisk together the extra virgin olive oil, lemon juice, minced garlic, dried oregano, sea salt, and black pepper.
Place the chicken breast, cubed sweet potatoes, broccoli florets, and drained chickpeas onto the prepared sheet pan.
Drizzle the lemon-herb oil mixture over the chicken and vegetables, tossing everything thoroughly to ensure an even coating.
Spread the ingredients out into a single layer, ensuring the chicken has enough space to roast properly.
Bake 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 sprinkle the crumbled feta cheese over the hot sheet pan before serving.