Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Slice the chicken breast into even 1-inch strips and chop the zucchini into half-moons.
In a large mixing bowl, combine the chicken, broccoli florets, trimmed asparagus, and zucchini.
Drizzle the extra virgin olive oil over the mixture and add the minced garlic, sea salt, black pepper, 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 nothing is overcrowded so the vegetables roast rather than steam.
Roast in the oven for 18 to 22 minutes, or until the chicken is cooked through and the vegetables are tender and slightly browned at the edges.
Remove from the oven and immediately drizzle with fresh lemon juice and garnish with chopped fresh parsley before serving.