Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Pat the chicken breast dry with a paper towel to ensure a crispy finish, then cut into 1-inch bite-sized cubes.
Chop the broccoli, red bell pepper, and zucchini into uniform pieces to ensure they roast evenly alongside the chicken.
In a large mixing bowl, combine the chicken cubes and chopped vegetables, then drizzle with the extra virgin olive oil.
Sprinkle the sea salt, black pepper, garlic powder, dried oregano, and onion powder over the mixture.
Toss everything thoroughly until the chicken and vegetables are well-coated in the oil and spices.
Spread the mixture in a single layer on the prepared sheet pan, making sure not to overcrowd the pan so the ingredients roast rather than steam.
Roast for 18 to 22 minutes, tossing halfway through, until the chicken is cooked through and the vegetables are tender-crisp with browned edges.
Remove from the oven and serve immediately while the chicken is hot and the vegetables are vibrant.