Preheat your oven to 400°F (200°C) and line a small baking sheet with parchment paper.
Cut the chicken breast into 1-inch bite-sized cubes and thinly slice the zucchini into half-moons.
In a mixing bowl, combine the lemon juice, dried oregano, garlic powder, sea salt, and black pepper.
Add the chicken, zucchini, and chopped red bell pepper to the bowl, tossing thoroughly until every piece is coated in the herb mixture.
Spread the chicken and vegetables in a single layer on the prepared baking sheet to ensure even roasting.
Bake for 12 to 15 minutes, or until the chicken reaches an internal temperature of 165°F and the vegetables are tender.
Remove from the oven and let rest for 2 minutes before serving to keep the chicken juicy.