Preheat your oven to 400°F and line a large sheet pan with parchment paper for easy cleanup.
Cut the chicken breast into 1-inch bite-sized pieces and slice the zucchini, bell pepper, and red onion into similar uniform sizes.
In a small mixing bowl, whisk together the extra virgin olive oil, dried oregano, dried basil, garlic powder, sea salt, and black pepper.
Place the chicken and chopped vegetables onto the prepared sheet pan and pour the herb oil mixture over the top.
Toss the ingredients thoroughly with your hands or tongs to ensure every piece is evenly coated in the oil and spices.
Spread the mixture into a single layer across the pan, making sure the chicken pieces are not overlapping to ensure even browning.
Roast in the oven for 18 to 22 minutes, or until the chicken is cooked through and the vegetables are tender with slightly charred edges.
Remove the pan from the oven, drizzle with fresh lemon juice, and sprinkle with grated parmesan cheese before serving immediately.