Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Dice the sweet potato into 1/2-inch cubes and chop the red bell pepper into bite-sized pieces.
Cut the chicken breast into even 1-inch chunks to ensure they cook at the same rate as the vegetables.
In a large mixing bowl, combine the chicken, sweet potato cubes, broccoli florets, and bell peppers.
Drizzle with olive oil and sprinkle with sea salt, black pepper, garlic powder, and dried oregano.
Toss everything thoroughly until the chicken and vegetables are evenly coated in oil and spices.
Spread the mixture in a single layer on the prepared baking sheet, ensuring no pieces are overlapping.
Roast for 20-25 minutes, tossing halfway through, until the chicken is cooked through and the sweet potatoes are tender and golden.
Remove from the oven and let rest for 2 minutes before serving warm.