Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Dice the chicken breast and the peeled sweet potato into uniform 1-inch cubes to ensure they cook at the same rate.
In a large mixing bowl, combine the chicken, sweet potato cubes, and broccoli florets.
Drizzle with extra virgin olive oil and sprinkle with sea salt, black pepper, garlic powder, smoked paprika, and dried oregano.
Toss everything thoroughly until the ingredients are evenly coated in the oil and spices.
Spread the mixture in a single layer on the prepared baking sheet, making sure not to overcrowd the pan so the vegetables roast rather than steam.
Bake for 20 to 25 minutes, tossing the ingredients halfway through, until the chicken is cooked through and the sweet potatoes are fork-tender and golden brown.